32/15 X and 31/15 X are the following corresponds to the pair of atoms that are isotopes.
What atom pairs make up isotopes?Isotopes, also known as isotopic nuclides, are two atoms with the same atomic number but different masses (the same number of protons but different numbers of neutrons). Isotopes behave differently physically and chemically because the mass of these atoms is altered by their varied neutron counts.
Which pair of isotopes is this?A pair of atoms must belong to the same element in order for them to be isotopes. They must both contain the same number of protons in order to constitute the same element. They have the same atomic number if they have the same number of protons. Z stands for the atomic number.
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If you have 9.8 moles of Magnesium Nitrate, then how many grams is that?
PLEASE HURRY MANY POINTS GIVEN IF EXPLAINED RIGHT WITH RIGHT ANSWER 99 pts
which of the following diagrams correctly displays the polarization of a metal sphere by an electric field that points to the left, using the conventions discussed in the matter and interactions textbook?
According to the Matter and Interactions textbook, the correct diagram that displays the polarization of a metal sphere by an electric field that points to the left is diagram B in the figure.
Diagram B shows a metal sphere with a positive charge at the top and a negative charge at the bottom, with the electric field pointing to the left.
When a metal sphere is placed in an electric field, the field causes the positive charges in the metal to move to the side facing the field and the negative charges to the side facing away from the field.
This creates an induced electric dipole in the metal, where the positive side of the dipole is facing the field and the negative side is facing away from the field. This phenomenon is called polarization.
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family of macromolecules are composed of carbon, hydrogen and oxygen in a 1:2:1 ratio and includes sugars, starches, glycogen, and cellulose. multiple choice question. protein lipid nucleic acid carbohydrate need help? review these concept resources.
Macromolecules that are composed of carbon, hydrogen, and oxygen in a 1:2:1 ratio and include sugars, starches, glycogen, and cellulose is carbohydrate.
Macromolecules: Carbohydrate, Lipid, Protein, and Nucleic acidMacromolecules are molecules that are made of small molecules (monomers).
There are 4 types of macromolecules: carbohydrate, lipid, protein, and nucleic acid.
Carbohydrate is made up of monomer glucose. Each compound is composed of carbon, hydrogen, and oxygen in a 1: 2: 1 ratio. Carbohydrate is classified into polysaccharide (glycogen, starch, cellulose), disaccharide (lactose, sucrose, maltose), and monosaccharides (glucose, galactose, and fructose). Protein is composed of monomer amino acids. The elements of protein are carbon, hydrogen, oxygen, and nitrogen, also has -COOH, -NH2, and R groups.Lipids contain fatty acid and glycerol chains. The element that makes up the lipid are carbon, hydrogen, and oxygen (not in a 1: 2: 1 ratio). For example fats, and oils.Nucleic acid contains elements carbon, hydrogen, oxygen, nitrogen, and phosphorus. For example DNA, RNAThus, sugars, starches, glycogen, and cellulose are included in carbohydrates. The ratio of elements in carbohydrates is 1:2:1.
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the important hormone adrenaline, which has been on shows like firefly and the big bang theory is synthesized in our bodies by what type of chemical reaction
Some of the neurons in the central nervous system and the medulla of the adrenal glands both create adrenaline. In a stressful circumstance, adrenaline is immediately released into the blood, sending signals to the organs to trigger a certain response, within a few minutes.
What causes the body's adrenaline to rise?
Temporarily elevated adrenaline levels are caused by exercise. The majority of us are familiar with the common signs of adrenaline release, such as: rapid heartbeat, high blood pressure, anxiety, excessive sweating, and palpitations, because most individuals are occasionally subjected to stressful situations.
What body part produces adrenaline?
The inner portion of an adrenal gland called the adrenal medulla regulates the hormones that start the flight or fight response. The primary hormones that the adrenal medulla secretes adrenaline.
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cwhich of the following compounds, sodium bicarbonate or water, should be used to extinguish a grease fire?
Neither sodium bicarbonate nor water should be used to extinguish a grease fire. The best way to extinguish a grease fire is to turn off the heat source and cover the fire with a metal lid or a fire blanket to smother the flames.
Grease fires are caused by overheated cooking oils, and they can quickly spread and become very dangerous. Water is not effective in extinguishing a grease fire because water and oil don't mix, and when you pour water on a grease fire, the water will sink to the bottom of the pan and cause the hot oil to splatter and spread the fire. This can make the fire worse and increase the risk of injury.
Sodium bicarbonate, commonly known as baking soda, can be used to put out small kitchen fires, but it is not recommended for grease fires. Baking soda is an alkaline substance, and it works by neutralizing the acid that is produced by burning materials. However, when grease catches fire, it produces a lot of heat and smoke, and baking soda will not have any effect on the fire itself.
The best way to extinguish a grease fire is to turn off the heat source and cover the fire with a lid or a fire blanket to smother the flames. If you don't have a lid or a fire blanket, you can use baking soda, salt, or sand to cover the fire. This will remove the oxygen that the fire needs to burn, and the fire will go out.
It is important to remember that grease fires can be very dangerous, and if you are not sure how to put out the fire, you should evacuate the building and call the fire department.
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draw the radial probability functions r2r2(r) of the following atomic orbitals. be sure to indicate which curve corresponds to which orbital and label your axes.
The graphs for the radial probability functions r2r2(r) of the atomic orbitals can be made using the information provided below.
The radial probability function (rR2(r)) represents the probability of finding an electron in an orbital at a certain distance from the nucleus. The radial probability function can be used to visualize the size and shape of atomic orbitals. The values of the radial probability function are proportional to the square of the radial wave function.
For s-orbitals (1s, 2s, 3s, 4s), the radial probability functions are spherically symmetrical and centered on the nucleus. They decrease rapidly with increasing distance from the nucleus, reaching zero at a certain distance. The 1s orbital is the smallest and has the highest probability of finding an electron close to the nucleus. The 2s orbital is larger than the 1s orbital and has a lower probability of finding an electron close to the nucleus. Similarly, the 3s and 4s orbitals are larger and have lower probabilities of finding an electron close to the nucleus.
For p-orbitals (3p), the radial probability functions are not spherically symmetrical and have a nodal plane where the probability of finding an electron is zero. They have a maximum probability at a certain distance from the nucleus and decrease rapidly with increasing distance from the nucleus.
For d-orbitals (3d), the radial probability functions have more complex shapes with several nodal planes where the probability of finding an electron is zero. They have maxima and minima at different distances from the nucleus.
For f-orbitals (4f), the radial probability functions have even more complex shapes with multiple nodal planes and regions of maximum and minimum probability. The 4f orbitals are larger and have a lower probability of finding an electron close to the nucleus compared to the 3d orbitals.
The inclusion of relativistic effects in the calculations of the radial probability functions can result in differences in the shapes of the functions for s and f orbitals. However, the inclusion of relativistic effects does not significantly affect the shapes of the p and d orbitals.
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The complete question is:
Draw the radial probability functions rR2(r) of the following atomic orbitals Be sure to indicate which curve corresponds to which orbital and label your axes 1s, 2$, & 3s on the same graph b_ 3s, 3p, & 3d on the same graph 4s without relativistic effects and 4s with relativistic effects, on the same graph d. 4f without relativistic effects and 4f with relativistic effects, on the same graph.
if 10 moles of a3 are reacted with excess b2, how many moles of ab will be produced? very carefully enter the number below.
The amount of moles of AB produced depends on the chemical equation for the reaction of A3 and B2. Without the chemical equation, it is not possible to determine the amount of moles of AB that will be produced.
About MoleMole comes from the word moles which means a certain amount of mass or in other water a small amount of mass. In chemistry, the mole is the unit for the amount of a substance. In the field of physics, mole has a standard definition as the amount of mass of a substance that contains as many particles as atoms contained in 12 grams of C-12.
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an ionic bond is one in which . group of answer choices two charged atoms have a mutual attraction due to a transfer of electrons electrons are shared equally electrically neutral atoms have a mutual attraction electrons are shared unequally
Which statement does NOT explain why the stability of a protein is not simply the sum of the weak interaction free energies?
-The primary structure dictates exactly how the protein must fold.
-Hydrogen bonds with water must break for intra-protein hydrogen bonds to form.
-Ionic interactions may be either stabilizing or destabilizing.
-It is possible for the difference in free energies between the folded and unfolded states to be close to zero.
The correct option is option A. The primary structure dictates exactly how the protein must fold.
Protein stability is provided by the net balance of forces which are responsible for determining whether proteins will be denatured or form their folded configuration, i.e. in protein folding. The net stability is basically the difference present between the two huge opposing forces acting on it. Crystal formation of proteins depends on the properties of stability in proteins. The various factors which help in stability in the native folded structure of proteins are hydrogen bonding, hydrophobicity, electrostatic properties, and the factors which help provide stability in the unfolded structure are entropic and non-entropic free energies.
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FILL IN THE BLANK when a drop of ink is added to a beaker of water, the ink molecules become randomly dispersed throughout the water. this is an example of an increase in ___
Ink molecules are randomly distributed across water when an ink drop is put to the a beaker of water.This is an illustration of increased entropy.
What's an illustration of entropy?Ice melting is the ideal illustration of entropy.Its individual molecules are arranged and fixed as ice.The molecules become disorganized as the ice melts because they are now free to migrate.The molecules are subsequently liberated to travel independently through space as the water is heated to become a gas.
Entropy: What Is It?The amount of freedom that atoms inside a substance have to disperse, migrate, and organize themselves randomly is referred to as entropy.For instance, the atoms in a substance have more flexibility to move around when it transforms from a solid into a liquid, like ice to water.
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if a reaction has a very large equilibrium constant, which of these could also be true of the reaction.
Explanation:
-The reaction is highly favorable
-The reaction is spontaneous
-The reaction is exergonic
-The reaction has a large negative ΔG
calculate the diffusion coefficients for the diffusion of hydrogen through bcc iron and fcc aluminum are room temperature (25oc). for the diffusion of h into al, do
The diffusion coefficient (D) of a species can be calculated using the Arrhenius equation: D = D0 * exp(-Q/RT)
Where D0 is the pre-exponential factor, Q is the activation energy, R is the gas constant, and T is the temperature in Kelvin. For the diffusion of hydrogen through BCC iron, the activation energy is typically in the range of 85-105 kJ/mol. Using Q = 100 kJ/mol and T = 298 K (25°C), we can estimate D = [tex]2.2 * 10^-14 cm^2/s[/tex]. For the diffusion of H into Al, we already know D0 =[tex]0.11 cm^2/s[/tex]and Q = 9780 cal/mol. Converting Q to kJ/mol, we have Q = 40.8 kJ/mol. Using this value and T = 298 K, we can estimate D = [tex]7.3 * 10^-15 cm^2/s[/tex]. Based on these calculations, it is apparent that BCC iron would be better suited as the material for a high-pressure hydrogen storage tank due to its higher diffusion coefficient. The slower diffusion of hydrogen through aluminum would result in a lower rate of hydrogen uptake, making it a less suitable material for hydrogen storage applications.
The complete question is:
Calculate the diffusion coefficients for the diffusion of hydrogen through BCC iron and FCC aluminum at room temperature (25°C). For the diffusion of H into Al, D0 = 0.11 cm2/s and Q = 9780 cal/mol. Based on your calculations, which material would be better suited as the material for a high-pressure hydrogen storage tank?
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select which of the following fibers would be most likely to have been made from polymers and have a uniform, smooth appearance. (check all that apply) select which of the following fibers would be most likely to have been made from polymers and have a uniform, smooth appearance. (check all that apply) cotton polyester coir mohair acrylic nylon
Nylon & polyester polymers are mostly used in the textile sector.Both of these polymers are utilized in the textiles industry for the production of clothing.shortly following manufacturing, in a disorganized, random state.
What kind of fabrics are made of polymers?Polymer fibers are a subclass of artificial fibers that are created using solely physical processes from synthetic chemicals rather than natural materials (typically from petrochemical sources).These fibers are created from nylon polyamide. polyester in PET or PBT.
What three categories of polymers are there?Thermoplastics, thermosets, & elastomers are the three main categories of polymers.The best way to distinguish between these types is by how they behave when heated.
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Elements with atomic numbers of 104 and greater are known as super-heavy elements. None of these elements have been found in nature but instead have been made in a laboratory. They are very difficult and expensive to create, and they break down into other elements quickly. There currently are no practical applications for any of these elements. However, some scientists believe that, with further work, they may discover some isotopes and super-heavy elements that are move stable and that could possibly have practical implications. Do you think that scientists should continue to try and create super-heavy elements and expand the periodic table? explain why or why not
The goals of scientific research are to further knowledge and address pressing issues. This assisted us in comprehending the state of the art.
What is super-heavy elements?Chemical elements with an atomic number greater than 103 are referred to as superheavy elements, transactinide elements, transactinides, or super-heavy elements. The periodic table's superheavy elements are the ones that follow the actinides; lawrencium is the final actinide.
Superheavy elements are transuranium elements by definition, meaning they have atomic numbers higher than uranium (92). Lawrencium could also be added to conclude the 6d series, in accordance with the definition of 3 groups that the authors use. The goals of scientific research are to further knowledge and address pressing issues. This assisted us in comprehending the state of the art.
Therefore, the goals of scientific research are to further knowledge and address pressing issues. This assisted us in comprehending the state of the art.
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what type of bond does an unsaturated fatty acid contain that a saturated fatty acid does not? (figure 2-15)
An unsaturated fatty acid contains a double bond, which a saturated fatty acid does not.
Unsaturated fatty acids contain double bonds between some of the carbon atoms in their hydrocarbon chains, while saturated fatty acids have single bonds between all of their carbon atoms. These double bonds disrupt the continuity of the hydrocarbon chain, making unsaturated fatty acids less dense and more fluid at room temperature than saturated fatty acids. The double bonds also affect the chemical reactivity of the fatty acid and its ability to form hydrogen bonds with water molecules, among other things. This difference in bonding is why unsaturated fatty acids are considered healthier than saturated fatty acids, as they can help lower cholesterol levels in the blood and reduce the risk of heart disease.
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Answer my question please.
Let the electron configurations from top to down be labeled A - G
A - P
B - S
C - Ca
D - Br
E - C
F - Al
G - Co
What is electron configuration?Electron configuration refers to the arrangement of electrons in an atom. It describes the distribution of electrons in the various atomic orbitals of an element, including the energy levels and subshells occupied by electrons. The electron configuration is written using the notation of the element's atomic number, its symbol, and a set of superscripts indicating the number of electrons in each orbital.
For example, the electron configuration of carbon (atomic number 6) can be written as 1s2 2s2 2p2. This indicates that carbon has two electrons in the first energy level (1s), two electrons in the second energy level (2s), and two electrons in the second level's second subshell (2p).
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which of the following bonds is not a chemical bond? nonpolar covalent bond hydrogen bond ionic bond polar covalent bond
The bond that is not a chemical bond is a nonpolar covalent bond
A chemical bond is the power of attraction that keeps two atoms intact. There are four kinds of chemical bonds: covalent, ionic, polar covalent, and hydrogen bonds.
Covalent bonds structure when atoms share electrons to fulfill the octet rule and accomplish stability. They can be either polar or nonpolar, contingent upon the conveyance of electrons in the bond.
Ionic bonds structure among positive and negative ions and are a consequence of the exchange of electrons starting with one molecule and then onto the next.
Polar covalent bonds are a sort of covalent bond where the electrons are unevenly circulated, bringing about a fractional positive and halfway regrettable charge at one or the flip side of the bond.
Hydrogen bonds structure between a hydrogen atom and another electronegative particle and are a consequence of the powerless attraction between the to some degree positive hydrogen and somewhat regrettable electronegative molecule.
Therefore, the bond that is not a chemical bond is a nonpolar covalent bond.
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To calculate the maximum price of the bond, we need to consider the yield to maturity (YTM) required by Joey to earn an annual nominal interest rate of at least 8% convertible semiannually.
First, let's determine the number of semiannual periods the bond will pay coupons for. Since the bond has a maturity of 15 years and semiannual coupons, the total number of periods will be 15 years multiplied by 2 (for semiannual periods), which gives us 30 periods.
Next, we can calculate the present value of the semiannual coupons. The coupon payment is $60, and since the bond has a semiannual payment frequency, we need to discount each coupon payment by the semiannual yield rate to obtain the present value.
Now, let's calculate the present value of the redemption value. The redemption value is $1,200, which will be received at the end of the bond's maturity.
To find the maximum price of the bond, we need to calculate the present value of all the future cash flows (coupon payments and redemption value) and sum them up. The present value of the cash flows will be discounted using the semiannual yield rate required by Joey to earn an annual nominal interest rate of at least 8% convertible semiannually.
Finally, we can sum up the present value of the coupon payments and the present value of the redemption value to find the maximum price of the bond.
In this case, we also need to consider the possibility of the bond being called at $1,300 on any coupon date prior to maturity, starting at the end of year 10. If the bond is called, we only need to calculate the present value until the call date. If the bond is not called, we need to calculate the present value until maturity.
Let's assume a semiannual yield rate of r is required to meet Joey's 8% annual nominal interest rate.
1. Calculate the present value of the coupon payments:
- Determine the semiannual interest rate by dividing the annual nominal interest rate by 2: r/2.
- Use the present value of an ordinary annuity formula to calculate the present value of the coupon payments:
PV(coupons) = (Coupon Payment) x [1 - (1 + r/2)^(-n)] / (r/2), where n is the number of semiannual periods.
2. Calculate the present value of the redemption value:
- Use the present value formula to calculate the present value of the redemption value:
PV(redemption) = (Redemption Value) / (1 + r/2)^n, where n is the number of semiannual periods.
3. Sum up the present value of the coupon payments and the present value of the redemption value to find the maximum price of the bond:
Maximum Price = PV(coupons) + PV(redemption)
By following these steps, you can calculate the maximum price of the bond to guarantee that Joey will earn an annual nominal interest rate of at least 8% convertible semiannually.
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the average atomic mass of nitrogen is 14.0067 amu. the atomic masses of the two isotopes of nitrogen, n-14 and n-15 are 14.003074002 and 15.000108898 amu, respectively. use this information to determine the percent abundance of each isotope.
Utilize the atomic masses of each isotope and the percentage abundances of those isotopes to calculate the average atomic mass. To get the abundance in decimal notation, multiply each percentage by 100.
Which isotope is more plentiful and how can you determine it?Comparing the given isotopes to the weighted average on the periodic table will reveal the most common isotopic form of an element. H-1, H-2, and H-3 are three examples of the three hydrogen isotopes. The weighted average atomic mass of hydrogen is around 1.008 amu.
Between CL 35 and CL 37, which isotope is more prevalent?Two isotopes of chlorine—17 35 Cl (chlorine-35) and 17 37 Cl—arise spontaneously from chlorine (chlorine-37). Chlorine-35 is abundant in a 75% to 25% ratio, while chlorine-37 is scarce in a 25% to 30% ratio.
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Write a balanced equation and K₁, expression for the following Brønsted-Lowry base in water:
acetylide ion, HC=C. Include the states of all reactants and products in your equation.
A balanced equation may be used to describe this reaction:
HC=C(aq) + H2O(l) ⇌ H3C+C-(aq) + OH-(aq)
What is Brønsted-Lowry base?The Brnsted-Lowry hypothesis is an acid-base reaction theory that was separately proposed in 1923 by Johannes Nicolaus Brnsted and Thomas Martin Lowry. In a chemistry, a Brnsted-Lowry base is a molecule or ion that accepts a hydrogen ion. Because a hydrogen ion is often referred to as a proton, acids and bases are proton donors and acceptors, according to the Brnsted-Lowry definition.
Here,
The acetylide ion (HC=C) acts as a Brønsted-Lowry base in water, accepting a proton from water to form an acetylene cation (H3C+C-):
HC=C + H2O ⇌ H3C+C- + OH-
This reaction can be written as a balanced equation:
HC=C(aq) + H2O(l) ⇌ H3C+C-(aq) + OH-(aq)
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Arrange the following species in increasing ionization energy: O, O2, O2−, O2+. Explain your rationale.
The order of the increasing ionization energy is; O < O2^-< O2< O2^+
What is the ionization energy?Ionization energy is the minimum amount of energy required to remove an electron from a neutral atom or molecule to form a positive ion. It is a measure of the strength of the attractive forces between the electrons and the nucleus of an atom or molecule.
We can see that the O2^+ would have the highest ionization energy because it is has an orbital that is half filled and is therefore stable.
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What is the density of a piece of granite whose volume is 20 mL and mass is 53
grams?
3.05 g/mL
2.75 g/mL
4.0 g/mL
2.65 g/mL
2.65g/ml is the density of a piece of granite whose volume is 20 mL and mass is 53grams. Density is the mass of a specific material per unit volume.
What is density?Density is the mass of a specific material per unit volume. Density is defined as d = M/V, in which d represents density, M is weight, as well as V is volume. Density is generally expressed in grams every cubic centimetre. Water, for example, has a density of 1 gram per square centimeter, but Earth has a density of 5.51 kilograms per cubic centimetre.
Density is sometimes measured in kilos per cubic centimeter (in metre-kilogram-second or SI units). The density of air, for example, is 1.2 kilos per cubic metre.
density = mass / volume
=53/ 20
=2.65g/ml
Therefore, 2.65g/ml is the density of a piece of granite whose volume is 20 mL and mass is 53grams.
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Interactive Worked Example 11.2 Hydrogen Bonding
Part A
Which has the higher boiling point, HF or HCL? Why?
Match the compounds in the left column to the appropriate blanks in the sentence on the right. Make certain each sentence is complete before submitting your answer
_______ has a higher boiling point than _______ because, unlike ________, _________ is able to form hydrogen bonds. The hydrogen bond is the strongest of the intermolecular forces and requires more energy to break
Because it can form hydrogen bonds unlike HF, HCl has a higher boiling point than HF. The strongest intermolecular force is the hydrogen bond, which takes more energy to break than any other force.
Why does HCl have a high boiling point?
The fact that HCl has a higher normal boiling point than F2 (188 K vs. 85 K) is due to the dipole-dipole attractions between HCl molecules being stronger than those between nonpolar F2 molecules.
Do HCl's boiling points range from high to low?
Moving on to HBr and HI, the molecules get bigger, the van der Waal forces get stronger, and the boiling point gets hotter. HCl has the lowest boiling point as a result.
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Which of the following best describes sleet?
Answer:
Below
Explanation:
Sleet is liquid rain that freezes before it hits the ground....frozen rain
If the hydrogen ion concentration in the blood is above normal, which of the following might occur in order to reestablish homeostasis?
O Increase in tubular secretion of hydrogen ions (H).
O Decrease in ventilation rate.
O Plasma proteins ionize to release more H.
O Carbonic acid is broken down to bicarbonate and H.
If the hydrogen ion concentration in the blood is above normal, one of the ways to reestablish homeostasis is to Option A) increase the tubular secretion of hydrogen ions (H) in the kidneys.
This will help to remove excess H from the blood and bring the concentration back to normal levels. Another way to restore homeostasis is to increase the production of bicarbonate (HCO3-) in the body. This happens when carbonic acid is broken down to bicarbonate and H, which neutralizes the excess H in the blood and helps to restore the pH balance. However, decreasing the ventilation rate or having plasma proteins ionize to release more H would not be effective in bringing the hydrogen ion concentration back to normal levels.
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6.8 % C , 3.0 % O , and 90.2 % Br Express your answer as a chemical formula.
The formula is written for the compound as C3OBr6
What is the empirical formula?The empirical formula is the simplest whole number ratio of the atoms of the elements present in a compound. It represents the lowest whole number ratio of atoms in a molecule of a chemical substance. The empirical formula is determined by analyzing the elemental composition of a compound, either through chemical analysis or spectroscopic techniques.
We would then have that;
C - 6.8/12 O - 3.0/16 Br - 90.2/80
C - 0.57 O - 0.19 Br - 1.12
Dividing through by the lowest ratio we have;
C - 3 O - 1 B r - 6
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the number of molecules whose activation energy is high enough to react is greater as temperature increases.True or False
The statement "the number of molecules whose activation energy is high enough to react is greater as temperature increases" is TRUE.
The number of molecules whose activation energy is high enough to react is greater as temperature increases. This is because the increase in temperature results in an increase in the kinetic energy of the molecules, which makes more of them have sufficient energy to overcome the activation energy required for a reaction to occur. As a result, the reaction rate increases with an increase in temperature. This relationship is known as the Arrhenius equation and is widely used in the field of chemical kinetics to describe the effect of temperature on reaction rate.
The activation energy is a measure of the minimum energy required for a reaction to occur. It represents the energy barrier that must be overcome in order for a reaction to occur. When the temperature is increased, the kinetic energy of the molecules also increases, making it more likely for them to have enough energy to overcome the activation energy. This results in an increase in the number of molecules with sufficient energy to react, and therefore an increase in the reaction rate.
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Predict the products for each reaction in Column A. Write the Formulas for these prod- ucts on the product side of each equation In the space at the left, write the letter of the choice from Column B that indicates what type of product is produced during the reac- tion shown in Column A. Write as many choices as apply: (Hints: Compounds of group metals are never precipitates; H,S and COz are gases )
The formulas for these products on the product side of each equation:
water (c) 9. HBr (aq) + KOH (aq) → KBr + [tex]H_{2}O[/tex] (l)
gas, water (a,c) 10. [tex]HNO_{3}[/tex] (aq) + [tex]Na_{2}CO_{3}[/tex] (aq) → [tex]NaNO_{3}[/tex] (Aq) + [tex]H_{2}O[/tex] (l) + [tex]CO_{2}[/tex] (g)
precipitate (b) 11. NaI (aq) + Pb([tex]C_{2}H_{3}O_{3}[/tex]) (q) → [tex]NaC_{2} H_{3}O_{2}[/tex] (aq) + [tex]PbI_{2}[/tex]PbI2 (s)
water (c) 12. CsOH (aq) + [tex]H_{2}SO_{4}[/tex] (aq) → [tex]Cs_{2}SO_{4}[/tex] (aq) + [tex]H_{2}O[/tex] (l)
gas (a) 13. [tex]K_{2}S[/tex] (aq) + HCl (aq) → KCl (Aq) + [tex]H_{2}S[/tex] (g)
Precipitаtes аre insoluble ionic solid products of а reаction, formed when certаin cаtions аnd аnions combine in аn аqueous solution. The determining fаctors of the formаtion of а precipitаte cаn vаry. Some reаctions depend on temperаture, such аs solutions used for buffers, whereаs others аre dependent only on solution concentrаtion. The solids produced in precipitаte reаctions аre crystаlline solids, аnd cаn be suspended throughout the liquid or fаll to the bottom of the solution. The remаining fluid is cаlled supernаtаnt liquid. The two components of the mixture (precipitаte аnd supernаte) cаn be sepаrаted by vаrious methods, such аs filtrаtion, centrifuging, or decаnting.
Your questions are incomplete, but most probably your full questions can be seen in the Attachment.
Thus, the correct options are
9. c
10. a, c
11. b
12. c
13. a
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which of the following is not nucleophilic? group of answer choices a proton a carbanion an imidazole a hydroxide a carboxylic acid
From the given options, the proton is not considered to be nucleophilic. In contrast, protons are positively charged species that are electron-deficient and are attracted to electron-rich species and thus known as electrophiles.
Nucleophiles are species that are electron-rich and can donate electrons to form a new covalent bond. A proton (H+) does not fit this definition because it lacks electrons and cannot donate electrons to form a bond. Instead, protons are electrophilic, meaning they are electron-deficient and are attracted to electron-rich species. This property makes protons important in reactions where a species is converted into an electrophile, such as the conversion of an alcohol into an alkyl halide via an acid-catalyzed reaction.
Nucleophiles can be classified into several types, including anions, neutral molecules, and carbanions. Anions are negatively charged species that can act as nucleophiles, such as hydroxide (OH-), carbonate (CO32-), and nitrate (NO3-). Neutral nucleophiles include species such as water (H2O) and amines (NR3), which can participate in reactions by donating a lone pair of electrons. Carbanions are negatively charged carbon species that can act as nucleophiles, such as alkyl anions (R-) and enolates.
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If a H2 sample has a diffusion rate of 955 m/s, what is the rate of a Cl2 sample at the same temperature?
If a H₂ sample has a diffusion rate of 955 m/s, 5.95 is the rate of a Cl2 sample at the same temperature.
What is Grahm's law of diffusion ?Graham's law states that a gas's rate of diffusion or effusion is inversely proportional to its molar mass squared. The Formula can be written as follows. M1 denotes the molar mass of gas. 1. M2 denotes the molar mass of gas. 2. Rate1 is the rate of the first gas's effusion.
It supports in the separation of gases with varying densities. It aids in the separation of certain element isotopes. It aids in determining the molecular weight of an unknown gas by utilizing effusion rates.
According to Grahm's law of diffusion
rate (gas A) × √molar mass(gas A) = rate(gas B) × √molar mass (gas B)
For H₂ gas and Cl₂ gas
r H₂ / r Cl₂ = √molar mass of Cl₂ / molar mass of H₂
= √70.90 / 2
= √35.45
= 5.95
Thus, If a H₂ sample has a diffusion rate of 955 m/s, 5.95 is the rate of a Cl2 sample at the same temperature.
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The speed of light is ×2.998108/ms. How far does light travel in 2.0μs? Set the math up. But don't do any of it. Just leave your answer as a math expression. Also, be sure your answer includes all the correct unit symbols.
The distance traveled by light in 2 × 10-⁶s is 5.98 × 10²m
How to calculate distance?Distance refers to the amount of space between two points, usually geographical points, usually (but not necessarily) measured along a straight line.
Distance can be calculated by multiplying the speed by the time taken. According to this question, The speed of light is given as 2.99 × 10⁸m/s. If the light travels in 2.0μs, the distance traveled can be calculated as follows:
Speed = distance ÷ time
2.99 × 10⁸ = distance ÷ 2 × 10-⁶
distance = 5.98 × 10²m
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