C13 and H1 different signals (c and h), and splitting and integration and approximate chemical shift.
An approximate chemical shift range for different nuclei (carbon, hydrogen) based on common observations in NMR spectroscopy.
Carbon (13C):
Chemical shift range: around 0-200 ppm
Hydrogen (1H):
Chemical shift range: around 0-12 ppm
Nuclear magnetic resonance (NMR) spectroscopy is a powerful analytical tool that is used to study the structure and composition of molecules. It is based on the concept that certain nuclei in a molecule, such as hydrogen, can absorb and emit electromagnetic radiation in the radio frequency range when exposed to a magnetic field. By analyzing the patterns of absorption and emission, NMR spectroscopy can provide information about the chemical environment and connectivity of atoms within a molecule.
This information can be used to determine the molecular structure, identify the different types of atoms within a molecule, and quantify the amounts of different chemical species present in a sample. NMR spectroscopy has a wide range of applications in fields such as biochemistry, medicinal chemistry, materials science, and environmental chemistry, and is essential for the study of many complex chemical systems.
To learn more about NMR spectroscopy visit here:
brainly.com/question/28543039
#SPJ4
which of the following substances has the highest boiling point? group of answer choices ch3oh ch3br ch4 ne
As a result, the oxygen present in CH three oh H will produce intermolecular hydrogen bonding, which will raise CH three oh H's boiling point to the greatest level.
Temporary dipoles have a greater impact on boiling point than permanent dipoles because CH3Br has stronger total molecular forces of attraction than CH3Cl (due to its higher boiling point). explains TWO forces correctly. This leads to the conclusion that CH3OH possesses strong interactions and a wide range of electronegativity, which contributes to its high boiling point. The only intermolecular interactions present in CH4 are the weakest London dispersion forces of attraction.
Learn more about boiling point here :
https://brainly.com/question/28203474
#SPJ4
Suppose a new element with an average atomic mass of 22.810 u
is discovered on Mars. This element is composed of two isotopes. The most abundant isotope has a natural abundance of 75.806%
and an isotopic mass of 22.573 u.
Calculate the isotopic mass of the least abundant isotope.
Considering the definition of atomic mass, isotopes and atomic mass of an element, the isotopic mass of the least abundant isotope is 23.5526 u.
Definition of atomic massThe number of protons and neutrons determine the mass number of an element.
Definition of isotopeAn isotope is an atom that belongs to the same chemical element as another and has the same atomic number, but a different atomic mass. That is, isotopes have the same number of protons as normal atoms, but a different number of neutrons.
Definition of atomic massThe atomic masses of chemical elements are usually calculated as the weighted average of the masses of the different isotopes of each element, taking into account the relative abundance of each of them.
Isotopic mass of the least abundant isotopeIn this case, you know:
The element has an average atomic mass of 22.810 u.The most abundant isotope has a natural abundance of 75.806% and an isotopic mass of 22.573 u. Being the abundance of the two isotopes 100%, the least abundant isotope has an abundance of 100% - 75.806%= 24.194%Then, the isotopic mass of the least abundant isotope (mass) can be calculated as:
22.573 u×0.75806 + mass ×0.24194= 22.810 u
Solving:
22.573 u×0.75806 + mass ×0.24194= 22.810 u
mass ×0.24194= 22.810 u - 22.573 u×0.75806
mass= (22.810 u - 22.573 u×0.75806)÷ 0.24194
mass= 23.5526 u
Finally, the least abundant isotope has a mass of 23.5526 u.
Learn more about average atomic mass:
brainly.com/question/4923781
#SPJ1
if this student combines 100 molecules of a a and 100 molecules of b b , the student obtains 100 molecules of ab a b . how many molecules of a a would this student need to make 5000 molecules of ab a b ? (assume the student had enough of molecule b b to make 5000 molecules of ab a b .)
The student combines 100 molecules of A and 100 molecules of B to make 100 molecules of AB. Therefore, to make 5000 molecules of AB, the student would need 5000/100= 50 times the amount of A, or 50 * 100 = 5000 molecules of A.
The reaction of chemicals A and B to synthesize product AB can be represented by the chemical equation A + B → AB. This means that for every molecule of A and B that react, one molecule of AB is produced. In the scenario given, the student combines 100 molecules of A and 100 molecules of B to obtain 100 molecules of AB. To make 5000 molecules of AB, the student needs to increase the amount of A accordingly. Using the ratio of the initial reaction, we can determine that 50 times the initial amount of A (100 molecules) would be required to synthesize 5000 molecules of AB. Therefore, the student would need 5000 molecules of A.
Learn more about molecules here: brainly.com/question/19922822
#SPJ4
Complete question:
A student needs to conduct a reaction that combines chemicals A and B to synthesize product AB. If we write this as a chemical equation it looks like: A +B → AB If this student combines 100 molecules of A and 100 molecules of B, the student obtains 100 molecules of AB. How many molecules of A would this student need to make 5000 molecules of AB? (Assume the student had enough of molecule B to make 5000 molecules of AB.) Express your answer as an integer
which of the following statements about catalysts is false? a catalyst is present before the reaction begins, and is also present in the same form after the reaction ends.
The statement that is false is that a catalyst cannot affect the overall energy change for the reaction.
While catalysts are present before and after a reaction, they can affect the energy change since they can provide a different reaction pathway with a lower activation energy.
Catalysts can provide a different reaction pathway with a lower activation energy, which can affect the energy change of the reaction. This means that while a catalyst is present before and after a reaction, it can still affect the energy change of the reaction.
Learn more about catalysts
https://brainly.com/question/16781912
#SPJ4
. alkaid and merak are 25.6o apart in the earth's sky. in a diagram, show the relative positions of alkaid, merak, and our sun. find the distance in light years from alkaid to merak.
In the heavens above the earth, Alkaid and Merak are 25.60 light years apart.
A light-year measures distance rather than time (as the name might imply). The distance a light beam covers on Earth in one year, or around 6 trillion miles, is measured in light-years.
It seems to be a connect-the-dots picture on a piece of paper when viewed from Earth. The Big Dipper, however, would not appear flat at all if viewed from a different perspective. In reality, none of the stars in the Big Dipper are close to one another. Some are located seven times away from others. Dubhe and Merak, the Big Dipper's two end stars, are separated by nearly exactly 5 degrees.
The Ursa Major Moving Group's five stars—Mizar, Merak, Alioth, Megrez, and Phecda—are all within "just" a few light-years of each other at a distance of around 80 light-years, with Mizar being the closest at 78 light-years and Phecda being the furthest away at 84 light-years.
In this diagram, point A represents the location of Earth, point B the location of the Sun, point C the location of Merak, and point D the location of Alkaid. Alkaid, which is 104 light-years away, and Dubhe, which is 123 light-years away, are not only far farther away from us than the other stars, but they are also traveling in completely different directions.
To know about constellation
https://brainly.com/question/13048348
#SPJ4
in a polymer exchange membrane fuel cell h2 and o2 are combined to give water half cell reactions and overall reaction
This reaction takes place at the anode and cathode of the fuel cell, with hydrogen (H2) being oxidized at the anode and oxygen (O2) being reduced at the cathode. The flow of electrons (e-) through an external circuit provides the electrical power output of the fuel cell.
The half-cell reactions for hydrogen (H2) and oxygen (O2) in a polymer exchange membrane (PEM) fuel cell are:
Hydrogen half-cell reaction:
2H2(g) -> 4H+(aq) + 4e-
Oxygen half-cell reaction:
O2(g) + 4H+(aq) + 4e- -> 2H2O(l)
The overall reaction in the PEM fuel cell can be obtained by combining the half-cell reactions:
2H2(g) + O2(g) -> 2H2O(l)
Polymer Exchange Membrane (PEM) is a type of membrane used in a variety of applications, particularly in fuel cells and electrolysis. It is made of a thin, ion-conductive film sandwiched between two electrodes. The ion-conductive layer allows for the transfer of ions between the electrodes, while the non-conductive layers serve as a barrier, preventing the mixing of the reactants. PEMs are known for their high proton conductivity, fast ion transport, and stability under extreme conditions.
They are also able to operate at low temperatures, making them well-suited for use in portable and mobile applications. PEMs are typically made of hydrocarbon polymers, such as Nafion, and are typically produced in a thin, flexible sheet. Due to their ability to produce and consume hydrogen, PEMs are an important component in the development of fuel cell technology, which is seen as a promising alternative to traditional energy sources.
To learn more about Polymer exchange membrane (PEM) visit here:
brainly.com/question/29898550
#SPJ4
Hello , help me please)
The experimental percent yield of water in the hydrate is 61.67% and percent error is 38.33%.
What is percent yield?Percent yield is defined as the ratio of actual yield to the theoretical yield multiplied by 100. If the actual and theoretical yield are same then the percent yield is 100%.If actual yield is less than the theoretical yield then the percent yield is less than 100%.Reason of this condition arising is the incompletion of reaction or loss of sample during recovery process.
In the given problem percent yield of water in the hydrate is 22/35.67×100= 61.67%.Thus, percent error = 100-61.67= 38.33%.
Learn more about percent yield,here:
https://brainly.com/question/12704041
#SPJ1
s the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.target 1 of 6 the number of protons plus neutrons in an atom, represented as an average of all naturally occurring forms of the element, is known as blank.target 2 of 6 blank, also called micronutrients, are any chemical element required by living organisms in miniscule amounts, but cells require them to survive.target 3 of 6 blank is one of the four elements that make up 96.3% of living cells.target 4 of 6 blank is one of the seven elements that make up a small fraction, approximately 3.7%, of living cells.target 5 of 6 blank is one of the fourteen trace elements and is a component of certain digestive enzymes and other proteins.
The amount of electrons that surround the nucleus is dependent on how many protons there are, and the arrangement of such electron governs the majority of an element's chemical properties.
What affects the chemical and physical properties of an atom?An element's atomic number determines its chemical characteristics.The quantity of electrons in an atom determines bonding as well as various chemical properties.The atomic mass Z is equivalent to the amount pf electrons inside a neutral atom.
What influences an atom's chemical characteristics the most?The quantity of protons present in the nucleus affects an element's chemical characteristics.The atomic number refers to this quantity of protons.The total number of neutrons and protons in the atom's nucleus determines the mass of a atom, or its atomic mass.
To know more about electrons visit:
https://brainly.com/question/24372542
#SPJ4
given 9.17 grams of h2, how many grams of Nh3 are produced?Please look at screenshot.
141.67 g of NH₃ (ammonia) are produced 9.17 grams of hydrogen.
What is ammonia ?Ammonia is an inorganic compound. Which is made up of nitrogen and hydrogen with the formula NH₃. A stable binary hydride, and the simplest pnictogen hydride, ammonia is a colourless gas with a different pungent smell.
The balanced equation is as follows:
N₂ + 3H₂ ⇒ 2 NH₃
9.17 g N₂ x (1 mol/ 28.0g N₂) x (2 mol NH₃/ 1 mol N₂) × (51.54 g NH₃ / 1 molNH₃)
= 30.36 g
9.17 g H₂ x (1 mol H₂/ 2.00g H₂) × (2 mol NH₃/ 3 mol H₂) x (17.0g NH₃/ 1 mol NHL)
= 141.67 g
Thus, 141.67 g of NH₃ are produced 9.17 grams of hydrogen.
To learn more about the ammonia, follow the link;
https://brainly.com/question/15409518\
#SPJ1
what is compound name for Na2S
based on their positions in the periodic table, list the following atoms in order of increasing radius: sr, ca, si, cl.
Based on the positions in the periodic table, the atoms arranged in the order of their increasing radius - Cl < Si < Ca < Sr.
The distance between the valence shell and the nucleus is known as the atomic radius. The internuclear distance between two atoms is divided in half to obtain the measurement.
When an atom's energy level rises, it signifies that the number of its shells is growing, which causes the valence shell to migrate away from the nucleus and increase the atomic radius. The energy level and atomic radius rise in the periodic table from top to bottom as you descend.
In the periodic table, the proton number rises as you move from the left to the right of an era. As this number rises, the nucleus becomes stronger and will hold the electrons closer together, resulting in a smaller radius. The atomic radius accordingly lowers as you move from left to right in a period.
The atoms are first organised into groups based on their time. They will be arranged in each time according to their group number.
Fifth period is where Sr is.
Fourth period has Ca.
In the third period, Si is on Group 14 and Cl is on Group 17, respectively.
The atomic radius grows along with the period. The third period is therefore where we start, followed by the fourth, and finally the fifth. In the third period, the radius decreases as the proton number increases. We therefore begin with Cl and then Si.
So, the order is Cl < Si < Ca < Sr.
To know more about atomic radius from the link
brainly.com/question/15255548
#SPJ4
If 270 million tons of sulfuric acid have a mass of approximately 2.7 x 1014 g. what mass of sulfur is needed to produce 270 million tons of sulfuric acid?
As per the given reaction 2 moles or 64 g of S produces moles or 196 g of sulphuric acid. Hence, mass of sulphur needed to produce 2.7× 10¹⁴ g of sulphuric acid is 8.8 × 10¹³ g.
What is sulphuric acid ?Sulphuric acid is a very strong acid having very much industrial and laboratory significance. It is industrially produced by the combination of sulfur and oxygen gas.
From the balanced equation, it is clear that, 2 moles of S gives 2 moles of sulphuric acid.
molar mass of sulphuric acid = 98 g/mol
mass of 2 moles = 196 g.
mass of S = 32 g
mass of 2 moles of S = 64 g.
Then the mass of S required to produce 270 million tones of sulphuric acid is :
( 2.7× 10¹⁴ g × 64)/196 g = 8.8 × 10¹³ g.
Therefore, the mass of S required to 270 million tones of sulphuric acid is 8.8 × 10¹³ g.
Find more on sulphuric acid:
https://brainly.com/question/28513840
#SPJ1
put the four molecules in order based on increasing imf strength. water ethylene glycol ethanol diethyl ether
The four molecules in ascending strength of in order. ethanol, dichloromethane, ethyl acetate, water, and ethylene glycol
Solvents' polarity indices can be used to identify how polar they are. The capacity of the solvent to interact with various polar test solutes is measured by the polarity index.
With a polarity index of 2.8, diethyl ether is the least polar substance.
With a 3.1 polarity index, dichloromethane
4.3 on the polarity index of ethyl acetate
With a polarity index of 5.2, ethanol is the most polar substance.
These solvents' different polarity are caused by variances in their structural makeup. Because they include bonds between elements with vastly differing electronegativities, such oxygen and hydrogen, polar solvents exhibit enormous dipole moments.
Diethyl ether is less polar than dichloromethane, which has two electronegative chlorine atoms bound to a carbon atom, since it contains two non-polar methyl groups. Similarly, diethyl ether has a greater dipole moment than dichloromethane because it comprises two highly electronegative oxygen atoms bonded to carbon. Given the solvents, ethanol is the most polar because it possesses the oxygen hydrogen bond with the biggest dipole moment.
For such more question on ethylene glycol
https://brainly.com/question/13949258
#SPJ4
Note: The correct question would be as bellow,
Put the four molecules in order based on increasing imf strength
water
ethylene glycol
ethanol
diethyl ether
gaussian elimination.. for each of the following linear systems, use gaussian elimination to describe the solutions to the following systems of linear equations. in particular, determine whether each linear system has exactly one solution, infinitely many solutions, or no solutions.
The solution to the system of linear equations is x = 6, y = x / 3 - 1 = 1, z = 1, and w = 0.
To solve this system of linear equations using Gauss elimination, we first write the augmented matrix of the system:
\begin{bmatrix}
1, 2, -1, 1 &, 1 \
4 & -2 & -2 & 4 & 10 \
6 & 2 & 4 & 8 & 12 \
1 & -3 & 1 & 1 & 3 \
0 & 0 & 0 & 3 & 0
\end{bmatrix}
We can use row operations to reduce the matrix to a row echelon form, and then to a reduced row echelon form:
\begin{bmatrix}
1, 2, -1, 1, 1 \
0 & -6 & -5 & 7 & 10 \
0 & 10 & 11 & 16 & 22 \
0 & -3 & 1 & 1 & 3 \
0 & 0 & 0 & 3 & 0
\end{bmatrix}
\begin{bmatrix}
1, 2, -1, 1, 1 \
0 & -6 & -5 & 7 & 10 \
0 & 0 & 11 & 14 & 18 \
0, 0, 1,2, 3 \
0 & 0 & 0 & 3 & 0
\end{bmatrix}
\begin{bmatrix}
1, 2, -1, 1, 1 \
0 & -6 & -5 & 7 & 10 \
0 & 0 & 11 & 14 & 18 \
0 & 0 & 0 & 3 & 3 \
0, 0, 0, 0, 0
\end{bmatrix}
From the reduced row echelon form, we can solve for the variables in order, starting from the last equation:
w = 0
z = 3 / 3 = 1
y = (3 - x + y) / -3 = -1 + x / 3
x + 2(-1 + x / 3) - 1 + 0 = 1
x = 6
The solution to the system of linear equations is x = 6, y = x / 3 - 1 = 1, z = 1, and w = 0.
To know more about Gaussian elimination
brainly.com/question/29560851
The complete question is
Use Gauss elimination to solve the following systems of linear equations. If the system has infinitely
many solutions, express the solutions in terms of the parameter(s). In the case of no solution, just say so.
+ 2y – 2 + w = 1 4x – 2y – 2z + 4w = 10 6x + 2y + 4z +8w = 12 2 – 3y +3w= 0
x - 3y + 2+ w=3 6x – 2y + 2x + 2w = 2 8x – 8y + 4x + 5w = 8.
#SPJ4
FILL IN THE BLANK The results of an experiment are represented in tables, charts, or graphs and its hypothesis is discussed during the ___ phase of the scientific method.
The results of an experiment are represented in tables, charts, or graphs and its hypothesis is discussed during the "analysis" phase of the scientific method.
The scientific method is a systematic approach to conducting experiments and solving problems. It is a step-by-step process that starts with a question or problem and ends with a conclusion or solution. During the analysis phase of the scientific method, the results of the experiment are analyzed and interpreted. This includes representing the results in tables, charts, or graphs to make them easier to understand. The hypothesis, which is a tentative explanation for the problem or question being studied, is also discussed during this phase. In the analysis phase, the data is evaluated to determine if the hypothesis is supported or not. If the hypothesis is supported, it is considered to be confirmed, but if it is not supported, it is considered to be falsified. The analysis phase is an important step in the scientific method because it allows the researcher to draw meaningful conclusions from the data and make decisions based on the results of the experiment.
Learn more about hypothesis here: brainly.com/question/29519577
#SPJ4
which of the following conditions would argue in favor of therapeutic drug monitoring (tdm) for a given drug?
Drugs that are given chronically, drugs that are highly protein-bound, and drugs with a narrow therapeutic window with well-defined effective and toxic concentrations are good candidates for therapeutic drug monitoring (TDM). TDM is not useful if the effective and toxic concentrations are not well-defined and there is no reference for comparison.
Therapeutic drug monitoring (TDM) is a process used to monitor the effectiveness and safety of medications. TDM is typically used for drugs that are given chronically and for drugs that are highly protein-bound. Drugs that are highly protein-bound are good candidates for TDM because changes in plasma binding proteins can affect drug levels, making it important to monitor these levels to ensure they remain in a therapeutic range. On the other hand, drugs that have low toxicity and rare side effects are unlikely to need TDM. Additionally, TDM is not useful if the effective and toxic concentrations of a drug are not well-defined as there is no reference for comparison.
Learn more about therapeutic drug monitoring here: brainly.com/question/28273924
#SPJ4
which of the following is a correct prediction of the chemical shifts for the signals in the 1h nmr spectrum for the following compound?
The correct option is B, I = 1.1 ppm, II = 3.2 ppm, III = 1.4 ppm, IV = 0.9 ppm this compound is a correct prediction of the chemical shifts for the signals in the 1h nmr spectrum.
Spectrum refers to the range of different frequencies that make up different forms of electromagnetic radiation, such as radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. The electromagnetic spectrum is often visualized as a continuous range of frequencies from low to high, with each frequency corresponding to a different type of electromagnetic radiation.
In practice, the spectrum is divided into different regions based on the frequency of the radiation and its properties, with each region having different uses and applications. For example, radio waves are used for communication technologies like cell phones and Wi-Fi, while X-rays are used for medical imaging and radiation therapy. Understanding the electromagnetic spectrum is important for developing new technologies, as well as for understanding the behavior of matter and energy in the universe.
To learn more about Spectrum visit here:
brainly.com/question/3997802
#SPJ4
Complete Question:-
Which of the following is a correct prediction of the chemical shifts for the signals in the H NMR spectrum for the following compound?A. I = 0.9 ppm, II = 2.7 ppm, III = 1.2 ppm, IV = 0.9 ppm B. I = 1.1 ppm, II = 3.2 ppm, III = 1.4 ppm, IV = 0.9 ppm C. I = 0.9 ppm, II = 1.7 ppm, III = 1.2 ppm, IV = 1.1 ppm D.I = 0.9 ppm, II = 1.9 ppm, III = 3.4 ppm, IV = 0.9 ppm E. none of the these
the following mechanism was proposed for the reaction of h2(g) and icl(g). which of the following statements are true? hi(g) is a catalyst, hi(g) is an activated complex, hi(g) is an intermediate.
HI(g) is not a catalyst, but it is an activated complex and a reaction intermediate. When H2(g) and ICl(g) react, the activated complex HI(g) is formed, and it acts as an intermediate in the reaction.
When hydrogen (H2) and ICl (iodine chloride) react, the activated complex HI (hydrogen iodide) is formed and acts as an intermediate in the reaction. This intermediate is what allows the reactants to react and produces the products of the reaction.
HI is not a catalyst, but it helps facilitate the reaction by providing a pathway for the reaction to take place.
Learn more about catalyst
https://brainly.com/question/12507566
#SPJ4
how to solve error in final launch sequence: failed to start gdb server failed to start gdb server error in initializing st-link device. reason: (13) unknown. please check power and cabling to target.
This error message suggests that there is a problem with connecting to the ST-LINK device for debugging.
Here are some steps that you can try to resolve the issue:
Check the power and cabling to the target device. Make sure that the device is properly powered and that the cable connections are secure.If the cable connections are secure and the device is properly powered, try resetting the device and the ST-LINK device.Make sure that the latest version of the ST-LINK driver is installed on your computer. You can download the driver from the ST Microelectronics website.If you're using an ST-LINKv2 device, try using an ST-LINKv2-1 instead, as the v2 device can sometimes have compatibility issues.If you're still encountering the error, try uninstalling and reinstalling the software toolchain and debug software.If the above steps do not resolve the issue, consider reaching out to the manufacturer or seeking support from a community forum.
To learn more about debugging visit: https://brainly.com/question/2323335
#SPJ4
The element magnesium has three isotopes and an average atomic mass of 24.305 u.
Idenitfy the most abundant isotope of element magnesium.
Magnesium-24, with an atomic mass of 24 u, is the most prevalent isotope of magnesium.
What is isotope?Isotopes are atoms that have the same number of protons but differing numbers of neutrons. They have nearly identical chemical characteristics but differ in mass and hence in physical qualities. A chemical element in which the atoms have the same number of protons (part of an atom's nucleus) but a distinct number of neutrons (part of the nucleus of an atom). Carbon isotopes include carbon 12, carbon 13, and carbon 14.
Here,
The average atomic mass of an element is a weighted average of the masses of its isotopes, with the weights being the abundances of the isotopes. So, to determine the most abundant isotope of magnesium, we need to compare the abundances of its three isotopes and find the one with the highest abundance. Since the average atomic mass of magnesium is 24.305 u, we can use this value and the atomic masses of the three isotopes of magnesium to estimate their abundances. However, this requires more information and calculations that are beyond the scope of this answer.
In general, the most abundant isotope of magnesium is magnesium-24, which has an atomic mass of 24 u.
To know more about isotope,
https://brainly.com/question/5357969
#SPJ1
write a lewis structure for each of the following negative ions, and assign the formal negative charge to the correct atom:
A) CH3O⁻: The Lewis structure of this negative ion is:
O=C-H H | H | H
The oxygen atom has a formal charge of -1 and the carbon atom has a formal charge of +1.
B) NH2⁻: The Lewis structure of this negative ion is:
N-H H
The nitrogen atom has a formal charge of -1 and the hydrogen atoms have a formal charge of +1 each.
C) CN⁻: The Lewis structure of this negative ion is:
N=C
The nitrogen atom has a formal charge of -1 and the carbon atom has a formal charge of +1.
D) HCO2⁻: The Lewis structure of this negative ion is:
O=C-O H |
The oxygen atoms have a formal charge of -1 each and the carbon atom has a formal charge of +1.
E) HCO3⁻: The Lewis structure of this negative ion is:
O=C-O-O H | |
The oxygen atoms have a formal charge of -1 each and the carbon atom has a formal charge of +1.
F) HC2⁻: The Lewis structure of this negative ion is:
C=C-H H |
The carbon atoms have a formal charge of +1 each and the hydrogen atom has a formal charge of -1.
Learn more about lewis structure:
https://brainly.com/question/20300458
#SPJ4
How many grams of Fe(NO3)3 · 9 H2O are required to prepare 300.0 mL of a 0.333 M solution of Fe(NO3)3 · 9 H2O?
40.34 grams of Fe(NO3)3 · 9 H2O are required to prepare 300.0 mL of a 0.333 M solution of Fe(NO3)3 · 9 H2O.
What is molarity ?The term molarity is defined as the moles of a solute per liters of a solution. Molarity is also called as the molar concentration of a solution.
The molar mass of Fe(NO3)3 · 9 H2O is 403.9g/mol
Therefore, the moles of Fe(NO3)3 · 9 H2O present in 300ml of 0.333 M Solution = molarity × volume
=0.333 mol / L × 300ml × 10^-3 L/ml
=0.0999 moles
=0.0999 mol × 403.9g/mol
= 40.34 grams
40.34 grams of Fe(NO3)3 · 9 H2O are required.
Thus, 40.34 grams of Fe(NO3)3 · 9 H2O are required to prepare 300.0 mL of a 0.333 M solution of Fe(NO3)3 · 9 H2O.
To learn more about the molarity, follow the link;
https://brainly.com/question/8732513
#SPJ1
How many unique carbons are in the following molecules (how many signatures/peaks would you expect to see in a 13C NMR spectrum)?
the following molecules Unique Carbons is : a 1 b 1 c 6 d 7 e 8 f 9.
What are distinctive carbons?Carbon atoms are special because they can join to form extraordinarily long, strong chains that can contain different-sized branches or rings and frequently have tens of thousands more carbon atoms.Similar chains can be created by silicon and just few other elements, although they tend to be much shorter and less robust.
In how many different carbons does benzene come?With chemical formula C6H6, benzoene is a significant organic chemical compound. Its molecule is made up of 6 carbon atoms arranged in a ring, with 1 hydrogen atom connected to each carbon atom.
To know more about Unique Carbons visit:
https://brainly.com/question/28848720
#SPJ4
FILL THE BLANK Most elements occur in compounds combined with other elements by forcing chemical __, which are formed by the interaction of the __ of the atoms involved
Most elements occur in compounds combined with other elements by forming chemical bonds, which are formed by the interaction of the electrons of the atoms involved.
Chemical bonds are forces that hold atoms together to form molecules. There are several types of chemical bonds, including covalent bonds, ionic bonds, and metallic bonds, among others. The type of bond formed between two or more atoms depends on the electronegativity of the atoms involved and the nature of the interaction between their electrons.
In covalent bonds, atoms share electrons to form a shared electron pair and form a covalent bond. Covalent bonds are usually formed between atoms with similar electronegativities, and the bond is strongest when the electrons are shared equally between the atoms.
Ionic bonds, on the other hand, are formed when one atom donates an electron to another atom to form ions. Ionic bonds are typically formed between atoms with significantly different electronegativities, and the bond is strong because of the strong attraction between the positively charged ion and the negatively charged ion.
Metallic bonds are formed between metal atoms and involve the sharing of electrons between metal atoms to form a metallic lattice structure. The electrons in metallic bonds are delocalized, which means they are not associated with a single atom but are shared by all the metal atoms in the lattice.
Learn more about lattice here:
https://brainly.com/question/29441166
#SPJ4
true/false. a chemist has three compounds of similar molecular weight, but with different dominant intermolecular forces. select the compound that should have the lowest boiling point, based on the compound's dominant intermolecular force.
The statement is true, a chemist has three compounds of similar molecular weight, but with different dominant intermolecular forces.
A compounds with weaker intermolecular forces should have a lower boiling point compared to a compound with stronger intermolecular forces. Boiling point is directly proportional to the strength of intermolecular forces in a substance. The dominant intermolecular force in a substance determines the strength of these forces and thus affects the boiling point. For example, if one of the compounds has weak dispersion forces as its dominant intermolecular force, it should have the lowest boiling point compared to compounds with stronger forces such as hydrogen bonding or ionic bonding.
To know more about compounds please refer: https://brainly.com/question/20701644
#SPJ4
Which one of the following statements is appropriate for a band-to-band recombination process in a direct band gap semiconductor The electrons in the minimum of conduction band and the holes in the maximum of valence band need to have different momentum The electrons in the minimum of conduction band and the holes in the maximum of valence band need to have same momentum Both of these
The decomposition of nitrogen dioxide at a high temperature NO,(g) → NO(g) + 1/2 02(g) is second-order in this reactant. The rate constant for this reaction is 3.40 /mol min. Determine the time needed for the concentration of NO2 to decrease from 2.98 mol/L to 0.620 mol/L Time=_____ min
The amount of time required for concentration of NO2 to drop from 2.98 mol/L to 0.620 mol/L equals 4.96 min.
How does rate constant work?The proportional constant in the equation which defines the link between both the rate of the reaction & the concentrations of a reacting chemicals is known as the rate constant, also known as the specific rate constant.
The following equation provides the reaction's rate:
rate = k[NO2]
Because the reaction in NO2 is second-order, we can write:
(1/[NO2])d[NO2]/dt = k[NO2]
We obtain, (1/k) after rearranging and integrating.
dt = d[NO2]/[NO2]
The time required for the concentration to decrease from 2.98 mol/L to 0.620 mol/L is given by:
t = (1/k) ln([NO2]initial / [NO2]final)
= (1/3.40) ln(2.98/0.620)
= 4.96 min.
To know more about rate constant visit :
https://brainly.com/question/20305922
#SPJ4
the main reasons why h2co has a higher vapor pressure at a given temperature when compared to ch3oh is that h2co blank and blank.target 1 of 5target 2 of 5 2. the main reasons why ch4 has a higher vapor pressure at a given temperature when compared to ch3cl is that ch4 blank and blank.target 3 of 5target 4 of 5 3. the main reason why ch3oh has a higher vapor pressure at a given temperature when compared to ch3ch2ch2oh is that ch3oh blank.
possesses no h bonds. When compared to CH4, CH3Cl have lower vapor pressure. As a result of its higher polarity, CH3OH has a lower vapour pressure than H2CO.
Describe vapour pressure using an example?Specifications of Vapor PressureIt is significant to remember that whenever a liquid boils, the pressure of its vapor equals the atmospheric pressure.For instance, the vapor pressure of water when it boils above sea level is 1 atmosphere so because surrounding pressure also is 1 atmosphere.
What are Vapour Pressure and Raoult's Law?As according Raoult's law, the fractional vapour of a solvent was equal to it or the same as the vapour pressure of the pure solvent times the molar ratio present in the solutions.
To know more about vapour pressure visit:
https://brainly.com/question/2693029
#SPJ4
which of the following groups of organelles contain hydrolases, catalase, and detoxifying enzymes for drugs, respectively?
The following groups of organelles contain hydrolases, catalase, and detoxifying enzymes for drugs: lysosome, peroxisome, and smooth endoplasmic reticulum.
Lysosomes contain hydrolases, which are enzymes that break down various biomolecules including proteins, carbohydrates, and lipids. They also contain detoxifying enzymes that can break down drugs and other harmful substances.
Peroxisomes contain catalase, an enzyme that breaks down hydrogen peroxide, a toxic byproduct of cellular metabolism, into water and oxygen. Peroxisomes also contain detoxifying enzymes for drugs and other harmful substances.
The smooth endoplasmic reticulum (SER) also contains detoxifying enzymes for drugs and other toxic substances. These enzymes can modify the structure of the drugs and make them easier to excrete from the cell.
Overall, these organelles play a crucial role in cellular detoxification and help protect the cell from damage caused by toxic substances, including drugs.
To learn more about organelles visit: https://brainly.com/question/25742135
#SPJ4
pcovalent bonding occurs in both molecular and covalent-network solids. which of the following statements best explains why these two kinds of solids differ so greatly in their hardness and melting points?
covalent bonding occurs in both molecular and covalent-network solids. These two kinds of solids differ so greatly in their hardness and melting points because In molecular solids, the molecules are held in place by relatively weak intermolecular forces, and these forces can be broken with little energy.
Atoms that are covalently bound together to form a three-dimensional network or layers of two-dimensional networks make up covalent network solids. Covalent network solids have high melting points as a result of the strength of the covalent bonds.
Intermolecular forces, as opposed to intramolecular forces, such as the covalent bonds that bind atoms in molecules and polyatomic ions, keep molecules in a liquid or solid together. Covalent network solids are typically substantially stronger than intermolecular forces.
To learn more about Covalent network solids please visit - https://brainly.com/question/29240812
#SPJ4