If you add a bunch of the solvent, the solution could not be concentrated enough to recrystallize.
In order to have a solution that is saturated, it is essential that you incorporate the smallest possible quantity of the boiling solvent. If you add an excessive amount of solvent to the mixture, the solution may become too watered down for crystals to form.
It is essential to get the flask down to room temperature before placing it in ice water to finish the cooling process. A hurried crystal formation will result in the crystal lattice becoming contaminated with contaminants. In addition to this, the crystals that form will be more diminutive.
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what chemistry strategies did you employ to maximize the volume of co2 produced by sodium bicarb and acetic aci?
A reaction between sodium acetate, acetic acid, and sodium bicarbonate occurs. Carbon dioxide gas was produced when liquid vinegar was added to the solid baking soda.
When sodium bicarbonate and acetic acid combine, how much CO2 is released?Once the carbonic acid has broken down, water and carbon dioxide, or CO2, will be released. This results in 4.4 g of carbon dioxide being produced from the reaction of 8.4 g of sodium bicarbonate and 20 g of acetic acid.
Baking soda and vinegar combined, how much CO2 is produced?In the reaction of 5 cm3 baking soda and 100 cm3 vinegar, 0.083 moles of CO2 gas and 0.083 moles of sodium acetate should be produced, whereas 0.01 moles of sodium bicarbonate should remain unreacted.
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there are two naturally occurring isotopes of chlorine. cl35 has a mass of 34.9689 u.cl37 has a mass of 36.9659 u. cl 35 has a mass of 34.9689 u. cl 37 has a mass of 36.9659 u. determine the abundance of each isotope.
The abundance of chlorine-35 isotope is 34.964 u and that of chlorine-37 isotope is 55.44 u.
What are isotopes?Isotopes are defined as substances having same number of protons but different number of neutrons.Number of protons is characteristic for determining position of elements in the periodic table.
Since,all isotopes have the same number of protons and hence have same position.They have similar chemical properties as they have same number of electrons.
They find applications in the field of nuclear medicine and oil and gas research . There are 2 types of isotopes : stable and unstable
Abundance of chlorine-35= 34.9689×2/2=34.964 u and that of chlorine -37 is 36.9659×2/2=55.44 u.
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what is the empirical formula of a compound containing 35.4% of sr and 64.6% of br
A chemical with a formula of SrBr2 will contain 35.4% sr & 64.6% br, in accordance with the stated assertion.
SrBr2 is what kind of a compound?Chemically, strontium bromide has the chemical SrBr2. It is an inorganic compound that is white and odorless at room temperature. In a lab experiment, strontium bromide produces a vivid red color that shows the presence of potassium ions. Along with being utilized in flares, it also has some medical use.
In this case, we first convert the percent composition to moles:
35.4 g Sr / 87.62 g/mol = 0.404 mol Sr
64.6 g Br / 79.904 g/mol = 0.808 mol Br
0.808 mol Br / 0.404 mol Sr = 2.00
Sr:Br = 1:2
So, the empirical formula of the compound is SrBr2.
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a 25.0 ml sample of concentrated h3po4 (14.7 m) is diluted to a final volume of 750.0 ml. what is the molarity of the final solution? group of answer choices
The molarity of the final solution is 0.368 M.
Phosphoric acid, also known as orthophosphoric acid, monophosphoric acid, or phosphoric(V) acid, is an inorganic solid with the chemical formula H3PO4 that contains phosphorus.
This can be calculated using the equation [tex]M1V1 = M2V2,[/tex]
where [tex]M1[/tex] is the molarity of the concentrated [tex]H3PO4 (14.7 M)[/tex]
[tex]V1[/tex] is the volume of the concentrated [tex]H3PO4 (25.0 mL)[/tex]
[tex]M2[/tex] is the molarity of the diluted solution (unknown)
and [tex]V2[/tex] is the volume of the diluted solution, may be used to determine this [tex](750.0 mL)[/tex]
When the given numbers are plugged in, the result is
[tex](14.7 M)(25.0 mL) = M2(750.0 mL),[/tex]
[tex]M2 = 0.368 M.[/tex]
The Molarity of final solution is 0.368M
It is frequently found as an 85% aqueous solution, which is a syrupy liquid that is colourless, odourless, and non-volatile. It is a significant industrial chemical that is used in several fertilisers.
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complete question:
A 25.0 mL sample of concentrated H3PO4 (14.7 M) is diluted to a final volume of 750.0 mL. What is the molarity of the final solution?
Group of answer choices
0.368
0.750
0.490
0.980
Two graduated cylinders, one filled with water to 17 milliliters and one with water and a key filled to 25 milliliters.
Calculate the volume of this irregular solid to the nearest cubic centimeter.
What is the volume of the key?
Here, assume that the two cylinders are initially filled with 17 ml of water. But the water level in the second beaker raised to 25 m/ Then the difference in water level is the volume of the substance that is, volume of the key is 8 ml or 8 cm³.
What is Archimedes principal ?Archimedes principal states that, when an object is submerged in a fluid, the volume of displaced from the fluid is equal to the volume of the submerged object.
Objects with a density less than water will float on it. Whereas, objects denser than water will sink on it. Certain volume of water will replace or rises above by equal volume of the object.
Here, initially the water level was up to 17 ml. The water level raise up to 25 ml. Thus 8 ml of water is replaced by the key. Therefore, the volume of the key is 8 ml.
1 ml = 1 cm³
then volume of the key is 8 cm³.
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why is it necessary to balance chemical equations
Answer:
to satisfy the law of conservation of mass
Explanation:
have great day
Answer:
It is necessary for chemical equations to be balanced because of the law of conservation of mass (the mass of the products = the mass of the reactants).
Chemical equations follow/represent this law
what two types of energy is usually a product of combustion reactions?
When a material combines with oxygen gas, it produces electricity in the form of both heat and light. These two energies combine to generate a flame.
What are the uses of oxygen?The energy-producing process that powers the metabolic functions of most living organisms, respiration, depends heavily on oxygen. All living things, including humans, depend on the air that you breathe to survive.
Or is oxygen a gas?Since oxygen has an atomic number of 8 and the official chemical symbol O, an oxygen atom contains eight particles in its nuclei. At room temperature, oxygen is a gas that has no flavor, color, or odor. In nature, oxygen exists as a molecule.
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Separation of proteins in the first dimension of 2d gel electrophoresis is based on a protein’s molecular weight.a. True
b. False
True. The molecular weight of a protein determines how it is separated in the first dimension of a 2D gel electrophoresis.
What criteria does 2-D electrophoresis use to distinguish proteins?While two-dimensional gel electrophoresis separates proteins first on the basis of isoelectric point and secondly on the basis of size, one-dimensional SDS-PAGE separates proteins based on size.
How will the protein be separated using 2-D electrophoresis?In isoelectric focusing, proteins are first divided according to their isoelectric point (pl), then in a subsequent separation by SDS-PAGE, which separates proteins according to their molecular weight. Using high-throughput mass spectrometry, each protein spot on a 2D electrophoresis may be eluted and identified.
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a solution is prepared by dissolving 17.75 g sulfuric acid, h2so4, in enough water to make 100.0 ml of solution. if the density of the solution is 1.1094 g/ml, what is the mole fraction h2so4 in the solution?
if the density of the solution is 1.1094 g/ml, then the mole fraction [tex]H_{2}SO_{4}[/tex] in the solution is 0.0016.
The molar mass of (98.08 g/mol) can be used to calculate the number of moles:
moles of [tex]H_{2}SO_{4}[/tex] = mass / molar mass
moles of [tex]H_{2}SO_{4}[/tex] = 17.75 g / 98.08 g/mol = 0.1810 mol
The total mass of the solution can then be calculated using the density of the solution (1.1094 g/ml):
mass of solution = density x volume
mass of solution = 1.1094 g/ml x 100 ml = 111 g
Finally, the mole fraction of [tex]H_{2}SO_{4}[/tex] in the solution can be calculated by dividing the number of moles of [tex]H_{2}SO_{4}[/tex] by the total number of moles of solute in the solution:
In the solution, the mole fraction of [tex]H_{2}SO_{4}[/tex] is approximately 0.0016.
mole fraction [tex]H_{2}SO_{4}[/tex] = moles [tex]H_{2}SO_{4}[/tex] / (moles [tex]H_{2}SO_{4}[/tex] + moles water)
mole fraction [tex]H_{2}SO_{4}[/tex] [tex]= \frac{0.1810}{\frac{(0.1810+(111-17.75)}{18} } = 0.0016[/tex]
Because we have assumed that the density of water is close to 1 g/mL, we can calculate the moles of water in the solution by dividing the mass of water by its molar mass (18 g/mol).
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what features about the following lewis structure make this structure very unlikely to contribute much to the bonding in nco?
CN- And O+ be applied features about the following lewis structure make this structure very unlikely to contribute much to the bonding in nco.
Lewis structures, additionally known as Lewis dot formulas, Lewis dot systems, electron dot systems, or Lewis electron dot systems (LEDS), are diagrams that show the bonding among atoms of a molecule, in addition to the lone pairs of electrons that can exist in the molecule. A Lewis structure can be drawn for any covalently bonded molecule, as well as coordination compounds. The Lewis structure turned into named after Lewis structures extend the concept of the electron dot diagram by adding traces among atoms to symbolize shared pairs in a chemical bond.
Lewis systems display every atom and its role in the structure of the molecule through the use of its chemical symbol. lines are drawn among atoms that can be bonded to each other (pairs of dots may be used in preference to strains). extra electrons that form lone pairs are represented as pairs of dots and are placed subsequent to the atoms.
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assuming ideal solution behavior, what pressure of carbon dioxide is needed to maintain a co2 concentration of 0.10 m in a can of lemon-lime soda?
A pressure of 0.00305 atm of CO2 is needed to maintain a concentration of 0.10 M in a can of lemon-lime soda.
Assuming ideal solution behavior, the pressure of carbon dioxide required to maintain a concentration of 0.10 M in a can of lemon-lime soda can be calculated using the Henry's law constant.
Henry's law states that the pressure of a gas over a solution is proportional to the concentration of the gas in the solution. Mathematically, it can be expressed as:
P = k * C
where P is the pressure of the gas, C is the concentration of the gas in the solution, and k is the Henry's law constant.
Since the concentration of CO2 in the soda is 0.10 M, the pressure needed to maintain this concentration can be calculated as:
P = k x C
=> k x 0.10
The value of the Henry's law constant for CO2 in water varies with temperature, pressure, and the presence of other solutes. However, at 25°C and 1 atm pressure, the value of k is approximately 0.0305 M/atm.
So, the pressure of CO2 needed to maintain a concentration of 0.10 M in a can of lemon-lime soda at 25°C and 1 atm pressure is:
P = k x C
=> 0.0305 x 0.10
=> 0.00305 atm
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Can you guys please help me
The dish A will be chosen for the top dishes would make the food dish the warmest when placed on top of it.
What is energy ?The term energy is defined as the “ability to perform work, which is the ability to exert a force causing displacement of an object.”
The diagram clearly shows that the dish A contains the highest energy molecules, each with an energy of 30. Heat is an energy form. It is energy that is transferred between substances or systems due to a temperature difference.
Thus, choosing a dish that has maximum energy will provide the maximum heat.
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analyze the spectra, assigning all of the major peaks. what are the expected impurities in these reactions? do you see them in the spectra?
Spectra analysis is the process of interpreting the information contained in a spectrum, such as a mass, IR, NMR or Raman spectra. The peaks in a spectrum represent specific molecular species or functional groups, and the assignment of these peaks to specific compounds or functional groups is an important part of spectra analysis.
About SpectraThe emission spectra or emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an atom or molecule making a transition from a high energy state to a lower energy state.
In chemical reactions, impurities are often produced as byproducts and can interfere with the desired outcome. Some common impurities include unreacted starting materials, side products, contaminants, and degradation products. Whether or not these impurities are visible in a spectrum depends on the sensitivity of the instrument and the specific spectra being analyzed.
If you provide me with more specific information about the spectra you're analyzing, I would be happy to provide more information.
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determine the molality of a solution of methanol dissolved in ethanol for which the mole fraction of methanol is 0.126.
The molality of a solution of methanol dissolved in ethanol for which the mole fraction of methanol is 0.126 is 0.10m
We are given:
Mole fraction of methanol = 0.126
This means that 0.126 moles of methanol is present in 1 mole of a solution
Moles of ethanol = 1 - 0.126 = 0.874 moles
To calculate the mass for given number of moles, we use the equation:
Moles of ethanol = 0.874 moles
Molar mass of ethanol = 46 g/mol
Mass of ethanol=0.874*46=40.204g
To calculate the molality of solution, we use the equation:
Molarity=msolute*1000/Msolute*Wsolvent
Where,
m solute = Given mass of solute (methanol) = 0.126 g
Msolute = Molar mass of solute (methanol) = 32 g/mol
Wsolvent = Mass of solvent (ethanol) = 40.204 g
Putting values in above equation, we get:
Molality=0.126*1000/32*40.204=0.0979=0.10m
Hence, the molality of the solution is 0.11 m
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how many milligrams of iron(iii) chloride result when 13.1 mg of iron is reacted with an excess of chlorine gas?
Answer: 38.1 mg
Explanation:
Step 1: Write the equation for the reaction.
Fe (s) + Cl₂ (g) ⇒ FeCl₃ (s)
Step 2: Balance the equation.
2 Fe (s) + 3 Cl₂ (g) ⇒ 2 FeCl₃ (s)
Step 3: Convert 13.2 mg iron into moles iron.
13.1 mg x (1 g/1000 mg) x (1 mol/55.8 g) = .000235 mol Fe
Step 4: Use the balanced equation from step 2, the moles of Fe from step 3, and the molar mass of FeCl₃ to find the moles FeCl₃.
1 mole FeCl₃ = 162.2 g/mol
.000235 mol Fe x (2 mol FeCl₃/2 mol Fe) x (162.2 g FeCl₃/1 mol FeCl₃) = 0.0381 g FeCl₃
Step 5: Convert grams FeCl₃ to milligrams FeCl₃.
1 g = 1000 mg
0.0381 g FeCl₃ x 1000 mg/1 g = 38.1 mg
describe a situation (in 2-3 sentences) in which you would need to neutralize a chemical before discarding it down a drain.
A situation where it is necessary to neutralize a chemical before disposing of it because the chemical contains a compound that can affect nearby objects. For example, acid laboratory waste that needs to be neutralized before being discharged into the sewer. This is because acid solutions are corrosive so they can cause corrosion in water pipes.
What are the chemicals?A chemical substance or chemical, also known as a pure substance is a form of matter that has a constant chemical composition and characteristic properties.
The following are examples of some chemicals:
Carbon monoxide.Ammonia.Chlorine.Hydrochloric acid.Sulfuric acid.The disposal of chemicals is also not arbitrary because these chemicals can affect objects around them
As acid laboratory waste needs to be neutralized before being discharged into the sewer. This is because acid solutions are corrosive so they can cause corrosion in water pipes.
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greenhouse gases like co2 trap the outgoing thermal radiation from the surface that cools the earth, and only allow that radiation to be emitted to space and cool the climate system from an atmospheric altitude of about 12 km in the ir regions (wavelength bands) where co2 absorbs. describe all the changes that occur in the climate system what happens after we increase co2 in the atmosphere. assume that a radiative balance (ein
When the atmospheric concentration of CO2 increases, the greenhouse effect intensifies, and more thermal radiation is trapped and re-radiated back towards the surface. This leads to a warming of the surface, as well as the overall climate system, including the atmosphere.
When CO2 is increased in the atmosphere:
The total CO2 opacity of the atmosphere increases, meaning that the ability of CO2 to trap outgoing thermal radiation from the surface and prevent its escape to space increases.As a result of the increased CO2 opacity, the Earth's surface warms due to the trapping of more thermal radiation.To maintain a radiative balance (EIN = EOUT), the increased radiation from the warmer surface balances the reduced radiation from the CO2 bands.The altitude where CO2 can emit radiation to space does not decrease to 6 km. The altitude where CO2 can emit radiation to space depends on the atmospheric temperature profile and pressure, which are determined by the overall radiative balance, and not just the amount of CO2 in the atmosphere.Learn more about radiation here:
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in general, which characteristics are necessary for a location to be suitable for chemical storage? select one or more: warm dark dry poorly-ventilated cool
Warm, dark, and poorly-ventilated locations are generally not suitable for chemical storage. it can be stored in cool places most of the time.
In general, a location suitable for chemical storage should be:
Cool: Many chemicals are temperature-sensitive and can degrade or react with other substances if exposed to high temperatures.
Dry: Moisture can cause some chemicals to react or degrade, and can also increase the risk of fire or explosion if electrical equipment is present.
Well-ventilated: Proper ventilation is important to ensure that fumes or vapors generated by the chemicals are safely dispersed.
Away from sources of heat and ignition: Chemicals should be stored away from sources of heat, sparks, and flames, to minimize the risk of fire or explosion.
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Complete question:
in general, which characteristics are necessary for a location to be suitable for chemical storage? select one or more:
A. Warm
B. Dark
C. Dry
D. Poorly-ventilated cool
residents around lake gunter have been warned not to drink their water because it contains some unknown chemical contaminant that could be harmful. what is this called? group of answer choices pollution negligence carelessness
Residents around lake Gunter have been warned not to drink their water because it contains some unknown chemical contaminant that could be harmful because of pollution. Option A is correct.
Residents around a lake are warned not to drink their water due to the presence of an unknown chemical contaminant, is called "pollution".
Pollution refers to the presence of substances in the environment that are harmful to living organisms or ecosystems, and can cause negative effects such as disease, death, or ecological imbalance. In this case, the lake water has been contaminated with an unknown chemical that could be harmful to human health, leading to the warning for residents not to drink it.
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--The given question is incomplete, the complete question is
"Residents around Lake Gunter have been warned not to drink their water because it contains some unknown chemical contaminant that could be harmful. What is this called? A) Pollution B) Negligence C) Carelessness D) Recovery E) Biological disaster"--
The fact that each type of atom has a unique pattern of electron orbits helps explain why?
The fact that each type of atom has a unique pattern of electron orbits because various elements have varying quantities of protons and varied numbers and configurations of electrons causes unique spectral pattern.
Do all atom types have a distinct emission spectrum?
Each atom includes a large number of potential electron transitions, and each transition has a discrete energy difference. An emission spectrum is composed of a variety of transitions that produce different radiated wavelengths. The emission spectra of each element is specific.
Why are emission spectra even present in atoms?When excited electrons from elevated energy levels descend to lower energy levels, atomic emission spectra are emitted. The energy difference between the two energy levels the electron changed between is radiated by them as a photon (light).
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what are the lightest or least massive of the fundamental atomic particles? group of answer choices uranium nuclei neutrons protons electrons
The lightest or least massive of the fundamental atomic particles are electrons. Correct answer: letter E
Electrons have a mass of 9.109 × 10^−31 kg, which is much smaller than the masses of protons (1.672 × 10^−27 kg) and neutrons (1.674 × 10^−27 kg).
The amount of energy an electron has is related to its location within an atom. Electrons can exist in discrete energy levels, and can be moved between them by providing energy in the form of light or heat. This movement of electrons between energy levels is responsible for most of the physical and chemical properties of atoms and molecules. Electrons can also form bonds between two atoms, allowing them to form molecules and compounds.
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in the proton nmr spectrum for this compound, how many signals would you expect to see for the two hydrogens drawn on the right side of this molecule?
In the proton nmr spectrum for this compound, Only one signal will be produced in its spectrum.
A molecule is a collection of two or greater atoms held together by means of appealing forces referred to as chemical bonds; relying on context, the time period may additionally or won't encompass ions that satisfy this criterion. In quantum physics, organic chemistry, and biochemistry, the distinction from ions is dropped and the molecule is frequently used when relating to polyatomic ions.
Standards much like molecules have been discussed due to the fact that ancient times, but modern-day research into the character of molecules and their bonds started in the seventeenth century. refined over the years by means of scientists including Robert Boyle, Amedeo Avogadro, Jean Perrin, and Linus Pauling, the have look at molecules is nowadays called molecular physics or molecular chemistry.
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Solubility curve question. I will give brainliest if done correctly with work.
The solubility curve shows how much of teh solute can dissolve at a particular temperature.
What is the solubility curve?
A solubility curve is a graphical representation of the relationship between the temperature and the maximum amount of a solute that can dissolve in a given amount of solvent to form a solution. It shows the solubility of a solid solute in a liquid solvent, typically at a pressure of 1 atmosphere.
The solubility of a solute generally increases with temperature, and the solubility curve can be used to predict the concentration of a solution at a given temperature.
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true or false: in this experiment, freezing point depression should be positive when the freezing point of the solution is lower than the freezing point of the pure solvent: group of answer choices true false
The stament is True, because, When the freezing point of the solution is lower than the freezing point of the pure solvent , it indicates that freezing point depression has occurred, and it is considered to be a positive result.
When a solution is composed of two or more components, the freezing point of the solution is usually lower than the freezing point of the pure solvent. This phenomenon is known as freezing point depression. Freezing point depression occurs because the addition of solutes to the solvent increases the energy required for the molecules to form the solid lattice structure associated with freezing. As a result, the temperature has to be lowered to the point where it can provide enough energy to form the lattice, and this is the freezing point of the solution.
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5. the reaction between ethyl bromide (c2hbr) and hydroxide ion in ethyl alcohol at 330k: c2h5br (aq) oh-1 (aq) c2h2oh (l) br-1 (aq) is first order each in ethyl bromide and hydroxide ion. when [c2h5br] is 0.0477 m and [oh-1] is 0.100 m, the rate of disappearance of ethyl bromide is 1.7 x 10-7 m/s. (c) how would the rate of disappearance of ethyl bromide change if the solution were diluted by adding an equal volume of pure ethyl alcohol to the solution?
The value of the rate constant is 3.6×[tex]10^{-5} m^{-1} s^{-1}[/tex].
The rate law is:
Rate = k[C2H5Br][OH-]
Substituting values given :
1.7× [tex]10^{-7[/tex] = k × 0.0477×0.100
Rate constant k= 3.56×[tex]10^{-5} m^{-1} s^{-1}[/tex]≈ 3.6×[tex]10^{-5} m^{-1} s^{-1}[/tex]
A chemical response is a manner that leads to the chemical transformation of 1 set of chemical substances to any other. Classically, chemical reactions embody modifications that handiest involve the positions of electrons inside the forming and breaking of chemical bonds among atoms, without exchange to the nuclei (no change to the factors gift), and may regularly be described with the aid of a chemical equation. Nuclear chemistry is a sub-area of chemistry that involves the chemical reactions of risky and radioactive elements where both electronic and nuclear modifications can arise.
The substance (or materials) initially worried in a chemical reaction are called reactants or reagents. Chemical reactions are commonly characterized by using a chemical trade, and they yield one or greater merchandise, which usually have residences exclusive from the reactants. Reactions often encompass a sequence of man or woman sub-steps, so-referred to as fundamental reactions, and the statistics on the correct path of movement are part of the response mechanism.
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Complete Question:
The reaction between ethyl bromide (C2H5Br) and hydroxide ion in ethyl alcohol at 330 K, C2H5BR(alc) + OH-(alc) --> C2H5OH(l) + Br-(alc), is first order each in ethyl bromide and hydroxide ion. When [C2H5Br] is 0.0477 M and [OH-] is 0.100 M, the rate of disappearance of ethyl bromide is 1.7 x 10^-7 M/s.What is the value of the rate constant?
find the molarity of 0.585g nacl present in 500 ml of solution. select one: a. 0.01 m. b. 0.02 m c. 0.1 m. d. 0.2 m.
The molarity of 0.585g of NaCl present in 500 mL of solution is d. 0.2 M. It can be calculated using the formula:
Molarity = moles / volume.
To find the molarity, you need to first find the number of moles of NaCl present in the solution.
This can be done using the formula:
moles = mass / molar mass
Where molar mass of NaCl = 23 + 35.5 = 58.5 g/mol
moles = 0.585g / 58.5 g/mol = 0.01 mol
Next, you need to find the volume of the solution in liters.
Volume = 500 mL = 0.5 L
Finally, the molarity can be found using the formula:
Molarity = moles / volume
Molarity = 0.01 mol / 0.5 L = 0.02 M = 0.2 M
Molarity is a unit of concentration that expresses the number of moles of solute (in this case, NaCl) per liter of solution. It is commonly used in chemistry to quantify the amount of solute in a solution.
To calculate molarity, you need to know the number of moles of solute and the volume of the solution. In this case, the number of moles was calculated by dividing the mass of NaCl by its molar mass. The volume of the solution was converted from milliliters to liters.
Finally, molarity was calculated by dividing the number of moles of solute by the volume of the solution. The answer, 0.2 M, represents that there are 0.2 moles of NaCl in every liter of the solution.
It's important to note that the molarity of a solution depends on the amount of solute and the volume of the solution, so it can change if either of these values change.
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what level of protein structure is associated with the sequence of amino acids?
The primary structure of a protein is only the arrangement of the amino acids within a polypeptide chain.
The definition of primary structure.A chain of such amino acids arranged in a linear fashion makes up the main structure. Areas of amino acid chains which are stabilized via hydrogen bonds from of the polypeptide backbone are found in the secondary structure. The secondary structure is produced by these hydrogen bonds as alpha-helixes and beta-pleated sheets.
What purpose does the primary structure serve?Protein's primary structure. The precise arrangement of amino acids in the chains that make up proteins' primary structures. As the final fold and hence the function of a protein are determined by the precise sequence of the proteins, it is crucial.
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millie mole combines 0.8 moles of a and 0.5 moles of b. how many moles of c will form in the reaction, assuming that all available reagents will be converted to product?
The amount of C that will develop is 0.5 moles since B is limiting. As a result, some A will remain after the reaction and all of the B will be consumed.
The mole ratios of the reactants and products are shown by the balanced chemical equation. We know that one mole of A interacts with one mole of B to generate one mole of C since the equation is balanced. As a result, the reaction will produce an identical amount of moles of C. Given that Millie Mole contains 0.8 moles of A and 0.5 moles of B, the quantity of C that may be generated depends on the amount of B, which acts as the limiting reactant. Since B is restricting, only 0.5 moles of C will grow. As a result, following the reaction, some A will be left behind and no B will be present.
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a flask contains three gases, nitrogen, oxygen, and ammonia. the nitrogen has a partial pressure of 6.52 atm, the oxygen has a partial pressure of 886 torr, and the ammonia has a partial pressure of 2,487 kpa. what it the total pressure in the flask expressed in atm?
To find the total pressure in the flask, First we need to add up the partial pressures of the three gases.
After that we have to convert the partial pressure of oxygen to atmospheres and the partial pressure of ammonia to atmospheres.
1 atm = 760 torr
Therefore, the partial pressure of oxygen in atmospheres is:
886 torr / 760 torr/atm = 1.1667 atm
1 atm = 101.325 kPa
Then, the partial pressure of ammonia in atmospheres is:
2,487 kPa / 101.325 kPa/atm = 24.57 atm
The total pressure in the flask would be-
6.52 atm + 1.1667 atm + 24.57 atm = 32.2567 atm
Rounding to three decimal places:
32.2567 atm = 32.257 atm
Hence, The total pressure in the flask is 32.257 atm.
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How do you think the -OH on the end of the pentanol molecule will affect the surface tension? Will pentanol have greater surface tension, less surface tension, or about the same surface tension as pentane or hexane? Write a prediction in the space below, and then submit your answer to move to the next section.
The -OH on the end of the pentanol molecule will affect the surface tension as it will be higher as that of as pentane or hexane.
What is Surface tension?This is referred to as the tension of the surface film of a liquid caused by the attraction of the particles in the surface layer by the bulk of the liquid.
It minimizes the surface area and the higher strength of the intermolecular force is present in the pentanol therefore the surface tension of the pentanol is more than surface tension of the pentane and hexane.
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