What is the oxygen-to-hydrogen mass ratio for h2o2?.

To identify the unknown metals X and Y, we need to compare their reduction potentials with the reduction potential of lead (Pb) given as E° = 0.3703 V. The reduction potential indicates the tendency of a species to gain electrons and undergo reduction.

If the measured cell potential for an unknown metal is greater than the reduction potential of Pb (0.3703 V), it means that the metal has a higher tendency to undergo reduction than Pb. On the other hand, if the measured cell potential is lower than the reduction potential of Pb, it means that the metal has a lower tendency to undergo reduction than Pb.

Let's consider the measured cell potentials for metals X and Y:

For metal X, if the measured cell potential is greater than 0.3703 V, it indicates that X has a higher tendency to undergo reduction than Pb.

For metal Y, if the measured cell potential is greater than 0.3703 V, it indicates that Y has a higher tendency to undergo reduction than Pb.

By comparing the measured cell potentials of X and Y with the reduction potential of Pb, we can identify which metal is X and which is Y based on their relative tendencies to undergo reduction compared to Pb.

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Answer:

john dalton.a

ernest rutherford .b

Answer:

A

Explanation:

it causes the genes of two different individuals to mix

Answer:

Explanation:

A. It causes the genes of two different individuals to mix.

The number of moles in a sample of neon containing 8.6 × 10²⁴ atoms is 14.3 moles.

The number of moles in a chemical compound can be calculated by dividing the number of atoms in the substance by Avogadro's number as follows:

no of moles = no of atoms ÷ 6.02 × 10²³

According to this question, there are 8.6 × 10²⁴ atoms in a sample of neon gas. The number of moles in the substance can be calculated as follows:

no of moles = 8.6 × 10²⁴ atoms ÷ 6.02 × 10²³

no of moles = 1.43 × 10¹

no of moles = 14.3 moles

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Answer:

14 moles

Explanation:

Hence, in order to create 87.5 g of water, we require 77.5 g of oxygen gas.

Exothermic means that the reaction between hydrogen and oxygen releases energy into the environment. water is produced when hydrogen and oxygen are combined. 2hydrogen + oxygen → water Fuel cells generate electricity through the reaction of a fuel and oxygen.

The equation must be balanced by adding a 2 coefficient to the left-hand side:  2hydrogen + oxygen → water

We can see from the equation that it is balanced that 1 mole of O2 reacts with 2 moles of water. The amount of moles of water created can be determined using the molar mass of water:

87.5 g water / (18.02 g/mol water) = 4.858 mol water

Hence, for the water to react, we just need half as many moles of oxygen:

4.858 mol water x (1 mol oxygen/2 mol water) = 2.429 mol oxygen

Finally, we may get the required mass of oxygen by using its molar mass:

2.429 mol oxygen x (32.00 g/mol oxygen) = 77.5 g O₂

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Answer:

Noble gas, any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).

Answer:

8.14x6.022×10^23 ~ 4.901908x10^24

Explanation:

The problem's conditions are best met by a pH range of roughly 5.6 to 8.2.

The H+ ion concentration's negative logarithm is known as pH. As a result, the meaning of pH is justified as the strength of hydrogen.

To determine the pH range that would allow Al(OH)₃ to precipitate but not Pb(OH)₂, we need to compare the solubility product (Ksp) of each compound with the concentration of the metal ion in solution under different pH conditions.

Let's start by writing the chemical equations for the precipitation reactions of Pb(OH)₂ and Al(OH)₃:

Pb2+ + 2OH- ⇌ Pb(OH)₂(s) Ksp = 1.43 x 10^-22

Al3+ + 3OH- ⇌ Al(OH)₃(s) Ksp = 4.6 x 10^-33

The solubility product expression for each reaction is:

Ksp(Pb(OH)₂) = [Pb²⁺][OH⁻]²

Ksp(Al(OH)₃) = [Al³⁺][OH-]³

At the pH range where Al(OH)₃ precipitates but not Pb(OH)₂, the concentration of OH⁻ will be high enough to exceed the Ksp for Al(OH)₃, but not high enough to exceed the Ksp for Pb(OH)₂.

Let's assume that all the OH⁻ ions come from the dissociation of water, as there are no other strong bases present. The dissociation constant of water, Kw, is 1.0 x 10⁻¹⁴ at 25°C, and can be expressed as:

Kw = [H⁺][OH⁻]

At equilibrium, the concentrations of H⁺ and OH⁻ will satisfy this equation. We can use the fact that the solution is electrically neutral to write:

[H⁺] = [OH⁻] + [Al³⁺] + [Pb²⁺]

We can substitute [OH⁻] in the Ksp expressions for each compound as:

Ksp(Pb(OH)₂) = [Pb²⁺][OH⁻]² = (Pb²⁺)²

Ksp(Al(OH)₃) = [Al³⁺][OH⁻]³ = (Al³⁺)³

Substituting [OH⁻] from the neutral equation, we obtain:

Ksp(Pb(OH)₂) = [Pb³⁺](Kw/[H⁺] - [Al³⁺] - [Pb⁺²])²

Ksp(Al(OH)₃) = [Al³⁺](Kw/[H⁺] - [Al³⁺] - [Pb2+])³

We can solve these equations for [H⁺] numerically using a computer program or a spreadsheet. The pH at which Al(OH)₃ starts to precipitate but Pb(OH)₂ does not is the one that corresponds to the concentration of OH⁻ needed to exceed Ksp(Al(OH)₃) but not Ksp(Pb(OH)₂).

The pH range that meets the conditions of the problem is approximately 5.6 to 8.2. At pH below 5.6, neither compound will precipitate, because there will not be enough OH⁻ ions. At pH above 8.2, both compounds will precipitate, because the concentration of OH⁻ will be high enough to exceed the Ksp for both compounds.

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Answer:

The moles of CO2 are in the tank is mathematically given as

n=1.431

Question Parameters:

A 10-liter tank of CO2 is at a pressure of 3.5 atm and a temperature of

25°C.

Generally, the equation for the ideal gas  is mathematically given as

PV=nRT

Therefore

n=PV/RT

n=354.638kpa*10/8.314 J/mol·K *298k

n=1.431

In conclusion,  moles of CO2 is in the tank is

n=1.431

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Answer:

the reaction was that it turned green. because it used to be brown but because the rain and carbon dioxide affected it.

Answer:

there are 37 atoms

Explanation:

The formula for nickel(II) acetate tetrahydrate is Ni(C2H3O2)4. To calculate the number of atoms in the formula, we need to count the number of atoms of each element and then multiply each by the number of times it appears in the formula.

Ni: There is 1 Ni atom in the formula.

C: There are 8 C atoms (4 from each C2H3O2) in the formula.

H: There are 12 H atoms (3 from each C2H3O2) in the formula.

O: There are 16 O atoms (4 from each C2H3O2) in the formula.

Therefore, the total number of atoms in the formula is 1 + 8 + 12 + 16 = 37.

So there are 37 atoms in Ni(C2H3O2)4.

The pressure changes from 100 kPa to 90 kPa, and the volume changes from 2.50 L to 3.75 L, the temperature changes from 303 K to 331.35 K.

To determine the temperature change when the pressure changes from 100 kPa to 90 kPa, we can use the combined gas law. The combined gas law states that the pressure, volume, and temperature of a gas are related by the equation:

(P₁ * V₁) / T₁ = (P₂ * V₂) / T₂

where P₁ and P₂ are the initial and final pressures, V₁ and V₂ are the initial and final volumes, and T₁ and T₂ are the initial and final temperatures.

Plugging in the given values, we have:

(100 kPa * 2.50 L) / 303 K = (90 kPa * 3.75 L) / T₂

Solving for T₂, we have:

T₂ = (90 kPa * 3.75 L * 303 K) / (100 kPa * 2.50 L)

T₂ ≈ 331.35 K

Therefore, when the pressure changes from 100 kPa to 90 kPa, and the volume changes from 2.50 L to 3.75 L, the temperature changes from 303 K to approximately 331.35 K. The temperature change can be determined using the combined gas law, which considers the inverse relationship between pressure and volume, and the direct relationship between temperature and volume, assuming the amount of gas and the gas constant remain constant.

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Answer:

B. or .0236

Explanation:

Multiply the 3 sides to get 558.095, then divide the mass and volume to get .0236

Answer:

when CO2 gas is passed through lime water it turns milky due to the formation of calcium carbonate which formula is CaCO3.

Ca(OH)2+ CO2------ CaCO3

when excess of carbon dioxide is passed through calcium carbonate calcium hydrogen carbonate is formed and solution become colourless.

CaCO3+CO2------ Ca(HCO3)

Answer:

Molarity of a solution = 1 mol / L

Explanation:

Given:

Amount of NaOH =20 g

Amount of water = 0.50 l

Find:

Molarity of a solution

Computation:

1 mol of NaOH = 40 g

So,

Moles of NaOH = 20 / 40 g = 0.50 mol NaOH

Molarity of a solution = moles of solute / Liters of solution

Molarity of a solution = 0.50 / 0.50

Molarity of a solution = 1 mol / L

According to kinetic molecular theory, collisions between gas particles in a sample of an ideal gas are perfectly elastic.

What is the kinetic molecular theory?

The kinetic molecular theory is a theoretical framework for understanding the physical behavior of matter. The theory proposes that all matter is made up of tiny, moving particles known as molecules or atoms. According to this theory, the physical properties of matter can be explained in terms of the behavior of these particles and their interactions with one another

According to the kinetic molecular theory, gas particles are in constant motion, moving in a straight line until they collide with another particle or the walls of their container. These collisions are perfectly elastic, meaning that the total energy of the particles before and after the collision remains the same. As a result of these collisions, gas particles spread out and fill the available space of their container, which is why gases take on the shape and volume of their container

.In addition, the kinetic molecular theory proposes that gas particles do not have any attraction or repulsion between them. The behavior of gases can be described using the ideal gas law, which states that the pressure, volume, and temperature of an ideal gas are related by the equation PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the temperature. This equation assumes that the gas particles are in constant motion and that their collisions are perfectly elastic, which is the case for an ideal gas.

Therefore, collisions between gas particles in a sample of an ideal gas are perfectly elastic, according to the kinetic molecular theory.

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The electron subshell being filled for the actinide series of elements on the periodic table is the 5f subshell. The Actinide series elements are a group of metallic elements located in Group 3 of the periodic table, which is below the transition metals.

In the periodic table, the Actinide series is the row below the Lanthanide series. The electron configuration for the Actinide series of elements can be predicted by the atomic number, with each atomic number adding another electron to the subshell. The Actinide series subshells are the 5f, 6d, 7s, and 7p subshells. Each Actinide element has its unique electron configuration and characteristic physical and chemical properties.

Actinide series elements are radioactive and unstable, making them challenging to isolate. Actinium (Ac), thorium (Th), protactinium (Pa), uranium (U), neptunium (Np), plutonium (Pu), americium (Am), curium (Cm), berkelium (Bk), californium (Cf), einsteinium (Es), fermium (Fm), mendelevium (Md), nobelium (No), and lawrencium (Lr) are all members of the Actinide series.

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The amino acid most likely to participate in hydrogen bonding with water is Asparagine.

Asparagine has an amide group (–CONH2) as its side chain, which is polar and can form hydrogen bonds with water.

Hydrogen bonds are a type of intermolecular force that occurs when a hydrogen atom of one molecule is attracted to an electronegative atom (usually oxygen or nitrogen) of another molecule.

In water, these hydrogen bonds help to stabilize the molecules and increase its boiling point.

The other amino acid side chains are not likely to form hydrogen bonds with water. Alanine has a methyl group (–CH3), which is non-polar and not able to form hydrogen bonds.

Leucine and valine both have an isopropyl group (–CH(CH3)2), which is also non-polar. Finally, Phenylalanine has a phenyl group (–C6H5), which is slightly polar, but not to the same extent as the amide group of Asparagine.

In conclusion, Asparagine is the amino acid side chain most likely to form hydrogen bonds with water. The other amino acid side chains are not able to form hydrogen bonds due to their non-polar nature.

Hydrogen bonds between Asparagine and water help to stabilize the molecules and increase its boiling point.

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φ(g1 * g2) = eH = φ(g1) * φ(g2).

This completes the proof that φ: G → H is a group homomorphism.

By showing that the map φ preserves the group operation, we have demonstrated that it is a group homomorphism.

To prove that φ: G → H is a group homomorphism, we need to show that it preserves the group operation. In other words, for any two elements g1 and g2 in G, φ(g1 * g2) = φ(g1) * φ(g2), where * denotes the group operation in G, and * denotes the group operation in H.

Given that φ(g) = eH for all g ∈ G, where eH is the identity element in H, we can start the proof as follows:

Let g1, g2 ∈ G. We want to show that φ(g1 * g2) = φ(g1) * φ(g2).

Since φ(g) = eH for all g ∈ G, we have φ(g1) = eH and φ(g2) = eH.

Now, consider the product g1 * g2 in G. Applying φ to both sides, we have:

φ(g1 * g2) = φ(g1) * φ(g2).

Substituting the values of φ(g1) and φ(g2), we get:

φ(g1 * g2) = eH * eH.

Since eH is the identity element in H, the product eH * eH is simply eH.

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The value of Kc for the given reaction is \(4.9 * 10^{-17}\) when the equilibrium concentrations are given.

To determine the value of Kc for the given reaction, we need to use the equilibrium concentrations of the reactants and products. The equilibrium constant, Kc, is defined as the ratio of the product concentrations to the reactant concentrations, each raised to the power of their stoichiometric coefficients.
For the reaction \(2N_2(g) + O_2(g) <--> 2N_2O(g)\), the expression for Kc is:
Kc =\([N_2O]^2 / ([N2]^2[O_2])\)
Substituting the given equilibrium concentrations, we get:
Kc = \((3.3 * 10^{-18})^2 / [(3.6)^2*(4.1)]\)
Kc = \(4.9 * 10^{-17}\)
Therefore, this indicates that at equilibrium, the reaction favors the formation of \(N_2O\) over \(N_2\) and \(O_2\), since the concentration of \(N_2O\) is much smaller than the concentrations of \(N_2\) and \(O_2\).

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Answer:

Bonding;lone

Explanation:

Answer:

Electrons are present around the nucleus.

Explanation:

The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.

Symbol= e⁻

Mass= 9.10938356×10⁻³¹ Kg

It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.

He constructed the glass tube and create vacuum in it. He applied electric current between electrodes. He noticed that a ray of particles coming from cathode to wards positively charged anode. This ray was cathode ray.

Properties of cathode ray:

The ray is travel in straight line.

The cathode ray is independent of composition of cathode.

When electric field is applied cathode ray is deflected towards the positively charged plate.

Hence it was consist of negatively charged particles.

While neutron and proton are present inside the nucleus. Proton has positive charge while neutron is electrically neutral. Proton is discovered by Rutherford while neutron is discovered by James Chadwick in 1932.

Symbol of proton= P⁺  

Symbol of neutron= n0  

Mass of proton=1.672623×10⁻²⁷ Kg

Mass of neutron=1.674929×10⁻²⁷ Kg

All these three subatomic particles construct an atom. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

Answer:

Negatively charged particals

Explanation:

Answer:

D

Explanation:

Answer:

2:38

Explanation:

Answer:

2.58 good luck with everything

Answer: Near the Protons. The electron structure of bromine is illustrated above. In chemical reactions, how does the valence configuration of Bromine tend to change? ... It loses one electron.

Explanation:

btw i found that on google lol