a gas sample containing 12 g of co2 has a volume of 14 l. what will the volume be if 12 g of he is added?

Answer:

50g

Explanation:

moalr mass of CaCO3= 40g/mol+ 12g/mol+(16g/mol*3)

                                   =52g/mol+48g/mol

                                   =100g/mol

1 mol= 100g

0.5mol=x

by cross multiplication,

0.5*100gmol=x mol

x=50g

Answer: A copper cylinder has a mass of 76.8 g and a specific heat of 0.092 cal/g·C. It ... J ql = mwcwΔTw. ΔTw = ql/(m x c). ΔTw = 7.96 x 10. 4. J/(625 g x 4.18 J/g·K) = 30.5 ...

Explanation:

Answer:

on the right side of the yield sign

Answer:

the answer is 2.75 but since that isn't an option I'd go with 1 because I just took a test with this question and it was the right answer.. hopefully that helps

The way will the energy be used after it will leaves the mitochondrion during the cellular respiration is the repairing parts of damaged tissue.

The energy from the food that we will be used after when it leaves the mitochondrion during the cellular respiration, and via this, the damaged cell will be repaired through the cellular respiration.

The Cellular respiration cane explained as the process by that the biological fuels will be oxidised in the presence of the inorganic electron acceptor, like as the oxygen. Therefore, during the cellular respiration is the repairing parts of the damaged tissue is the way energy be used.

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Answer:

what is the question?

Explanation:

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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The specific values of EL, EC, and ER will determine the precise behavior of the system and the probabilities of the electron being in each state over time.

To study the time evolution in this three-state system, we can write down the Hamiltonian matrix for the system.

The Hamiltonian describes the energy of the system and the transitions between different states. In this case, we have three states ∣L⟩, ∣C⟩, and ∣R⟩.

The Hamiltonian matrix can be written as:

H = [[EL 0 EC],

[0 EC 0],

[EC 0 ER]]

Here, EL represents the energy of state ∣L⟩, EC represents the energy of state ∣C⟩, and ER represents the energy of state ∣R⟩.

Since the electron can hop between the carbon atom and the oxygen atoms, we have nonzero off-diagonal elements in the Hamiltonian.

To solve for the time evolution of the system, we can find the eigenvalues and eigenvectors of the Hamiltonian matrix.

The eigenvectors represent the energy eigenstates of the system, and the eigenvalues represent the corresponding energies.

Once we have the energy eigenstates, we can determine the probabilities of the electron being in each state at a given time by calculating the time evolution of the initial state.

The specific values of EL, EC, and ER will determine the precise behavior of the system and the probabilities of the electron being in each state over time.

It is worth noting that the problem statement doesn't provide explicit values for EL, EC, and ER, so further information is needed to obtain a more detailed analysis of the time evolution in this three-state system.

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Answer:

60%

Explanation:

En la reacción:

2SO₂ + O₂ → 2SO₃

Donde 2 moles de SO₂ reaccionan por mol de O₂.

El peso atómico del SO₂ es:

1S = 32g/molₓ1 = 32g/mol

2O = 16g/molₓ2 = 32g/mol

SO₂ = 32g/mol + 32g/mol = 64g/mol

Y el peso atómico de O₂ es:

2O = 16g/molₓ2 = 32g/mol

Las moles de SO₂ y O₂ son:

SO₂: 40g ₓ (1mol / 64g) = 0.625 moles

O₂: 25g ₓ (1mol / 32g) = 0.7813 moles

Para una completa reacción de SO₂ se necesitan:

0.625 moles SO₂ ₓ (1mol O₂ / 2 mol SO₂) = 0.3125 moles de O₂

Así, las moles en exceso de O₂ son:

0.7813 moles - 0.3125 moles = 0.4688 moles O₂

En gramos:

0.4688 moles O₂ ₓ (32g / mol) = 15g O₂ están en exeso.

El porcentaje en exceso es:

15g / 25g ₓ 100 =

Explanation:

Concentration question....

0.965L x (0.0575 mol MgSO4 / 1L) x (120.4g MgSO4 / 1 mol MgSO4) = 6.68g MgSO4

The concept molarity is used here to determine the grams of magnesium sulfate dissolved in 0.965 L of a 0.0575 M solution. The mass of magnesium sulfate in grams is 6.68 g.

The molarity of a solution is defined as the number of moles of the solute present per litre of the solution. It is generally represented by the unit mol/L. The equation used to calculate the molarity is:

Molarity = Number of moles of the solute / Volume of the solution in litres

The molar mass of MgSO₄ = 120.36 g/mol

We have 0.0575 M solution.

That is 0.0575 mol/L × 120.36 g/mol = 6.9207 g/L

Here we want mass in 0.965 L. So the mass is:

Mass = 0.965 L × 6.9207 g/L = 6.68 g

Thus the mass in grams of magnesium sulfate is 6.68 g.

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Answer:

It can’t displace any more than its volume, assuming there is no external force pushing downwards.

Answer:

The name of the compound Cu(C2H3O2)2 is Copper(II) acetate.

In this name "Copper" refers to the element copper (Cu) and the "II" in parentheses refers to the oxidation state of copper which is +2. "Acetate" is the anion name of C2H3O2, which is the anion present in the compound.

The IUPAC name of the compound Cu(C\(_2\)H\(_3\)O\(_2\))\(_2\) is Copper(II) acetate. In this name, "Copper" means the chemical element copper (Cu), and the "II" in brackets stands for copper's +2 oxidation state.

Whether either an ongoing link or a ring, the greatest number of carbons joined by a single bond serves as the basis for IUPAC nomenclature. According to a certain set of priorities, any deviations, whether multiple bonds and atoms other than hydrogen and carbon, are denoted by prefixes or suffixes. In this name, "Copper" means the chemical element copper (Cu), and the "II" in brackets stands for copper's +2 oxidation state. The compound's anion, C\(_2\)H\(_3\)O\(_2\), is known by its anion name "acetate".

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A stiff metal bottle containing helium floats at the surface of the pond. If additional helium is added to that bottle, leaving its temperature and volume unchanged, the bottle will float because of the Archimedes principle.
This principle states that the buoyant force on a body is equal to the weight of the fluid displaced by the body. When a body is placed in a fluid, it experiences an upward force known as the buoyant force. If the buoyant force is greater than the weight of the body, the body will float.
In this case, the bottle containing helium floats on the surface of the pond because helium is less dense than air. Adding additional helium to the bottle will increase the volume of helium inside the bottle, but the temperature and volume of the bottle will remain the same. As a result, the buoyant force acting on the bottle will increase, making it float more easily on the surface of the pond.
However, it should be noted that the buoyant force acting on the bottle is also affected by the density of the fluid. If the density of the pond water increases, the buoyant force acting on the bottle will decrease, making it more difficult for the bottle to float. Therefore, the buoyancy of the bottle is determined by both the density of the fluid and the amount of helium in the bottle.

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a) The solution with the highest % hydrolysis is (NH4)2CO3
b) The solution with the highest H+ concentration is NH4Cl
c) The solution with the highest OH- concentration is Na2CO3
d) The solution with the lowest % hydrolysis is KCl
Hydrolysis is the reaction of salt with water to form an acidic or basic solution. The % hydrolysis of a salt solution is determined by the strength of the conjugate acid or base formed from the salt.
a) The solution with the highest % hydrolysis is (NH4)2CO3 because it forms the weak conjugate acid NH4+ and the weak conjugate base CO3 2-, both of which undergo significant hydrolysis.
b) The solution with the highest H+ concentration is NH4Cl because it forms the weak conjugate acid NH4+, which undergoes significant hydrolysis to produce H+ ions.
c) The solution with the highest OH- concentration is Na2CO3 because it forms the weak conjugate base CO3 2-, which undergoes significant hydrolysis to produce OH- ions.
d) The solution with the lowest % hydrolysis is KCl because it forms the strong conjugate acid HCl and the strong conjugate base KOH, neither of which undergo significant hydrolysis.

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When the three different phase compounds are mixed, and treat my mixture with aqueous NaOH the acidic mixture remain in the organic phase. So, right answer is option(b).

We have, a mixture which contain three compounds a,b and n. Here, a is acidic, b is base and n is non-acidic in nature. Then this mixture is treated with aqueous NaOH solution. As we know that NaOH is strong base so in order to divert our mixture to organic phase we need acidic mixture A to follow the acid - base extraction. The acid-base extraction method is used to separte the acidic, basic and the neutral compound. This is also known as liquid-liquid extraction. We can add add mineral base for an acidic and neutral compound to start and to take the proton away from the acidic compound. Because the acidic compound is ionic and water-soluble. So, the remained organic phase of solution is acidic.

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Complete question :

I have a mixture of 3 compounds: a is acidic, b is basic and n is non acidic. if i treat my mixture with aqueous naoh, which compound(s) will remain in the organic phase?

a) N ( neutral mixture)

b) A ( acidic mixture)

c) B ( basic mixture)

d) None of the above.

Answer:

0.419 mol O₂

Explanation:

just took test

I think it's 6

Explanation:

zeros between other nonzero digits are significant

ex. 50.3 has 3 significant figures. ex. 8101.01 has 6 significant figures

The calculated formula weight of the compound is the molar mass of the unknown compound.

The calculated formula weight of the compound can be determined using the given information. To find the formula weight, we need to calculate the number of moles of copper (Cu) obtained from the 0.9550 g of metallic Cu. The molar mass of copper is 63.55 g/mol. Number of moles of Cu = Mass of Cu / Molar mass of Cu. Number of moles of Cu = 0.9550 g / 63.55 g/mol

Next, we need to determine the number of moles of the unknown compound. Since the copper in the compound has a molar ratio of 1:1 with the unknown compound, the number of moles of the unknown compound is the same as the number of moles of copper obtained. Therefore, the calculated formula weight of the compound is the molar mass of the unknown compound.

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The whole Balanced Reactions Quick Check for Honors Chemistry A is

1) A. The reactants and products have the same number and type of atoms, but the atoms may be recombined.

2) B. It shows how many molecules there are of a particular substance.

3) D. NaOH + HCl → NaCl + H2O

4) A. Atoms always remain intact during chemical reactions.

5) D. 4, 4

The balanced chemical equation is:

CH₄ + 4Cl₂ —> CCl₄ + 4HCl

The numbers that balanced the equation are: 4, 4

To know the number that balanced the equation, we shall simply balance the equation.

CH₄ + Cl₂ —> CCl₄ + HCl

There are 4 atoms of H on the left side and 1 atom on the right side. It can be balance by writing 4 before HCl as shown below:

CH₄ + Cl₂ —> CCl₄ + 4HCl

There are 2 atoms of Cl on the left side and a total of 8 atoms on the right side. It can be balance by writing 4 before Cl₂ as shown below:

CH₄ + 4Cl₂ —> CCl₄ + 4HCl

Now, the equation is balanced

The numbers that balanced the equation are 4,4

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Answer:

Explanation:

Gas is a state of matter that has no fixed shape and no fixed volume. Gases have lower density than other states of matter, such as solids and liquids. There is a great deal of empty space between particles, which have a lot of kinetic energy.

Answer:

Gas is a state of matter that has no fixed shape and no fixed volume. Gases have lower density than other states of matter, such as solids and liquids. There is a great deal of empty space between particles, which have a lot of kinetic energy.

Explanation:

(a) The wavelength of the electron is 202.25885 nm

(b) The minimum energy required to remove the electron is 1.6565 × 10⁻¹⁷ J

(c) The wavelength of the causing radiation is approximately 8.84 nm

(d) X-ray

The question parameters are;

The given parameters of the electron are;

The velocity of the electron, v = 3.6 × 10³ km/s

(a) de Broglie wavelength is given as follows;

λ = h/(m·v)

Where;

λ = The wavelength of the wave

h = Planck's constant = 6.626 × 10⁻³⁴ J·s

m = The mass of the electron = 9.1 × 10⁻³¹ kg

Therefore, we get;

λ = 6.626 × 10⁻³⁴/(9.1 × 10⁻³¹ × 3.6 × 10⁶) = 202.25885 × 10⁻⁶

The wavelength, λ, of the electron is 202.25885 × 10⁻⁶ m = 202.25885 nm

(b) The energy required to remove the electron from the metal surface is known as the work function, W₀, which is given by the following formula

W₀ = h·f₀

Where;

f₀ = The threshold frequency

Given that the threshold frequency, f₀ = 2.50 × 10¹⁶ Hz, we have;

W₀ = 6.626 × 10⁻³⁴ J·s × 2.50 × 10¹⁶ Hz = 1.6565 × 10⁻¹⁷ J

The energy required to remove the electron from the metal surface, W₀ = 1.6565 × 10⁻¹⁷ J

(c) The wavelength of the radiation that caused the photoejection of the electron is given as follows;

The energy of the incoming photon, E = W₀ + (1/2)·m·v²

Where;

v = The velocity of the electron, and m = The mass of the electron

Therefore;

E = 1.6565 × 10⁻¹⁷ + (1/2) × 9.1 × 10⁻³¹ kg × (3.6 × 10⁶ m/s)² = 2.24618 × 10⁻¹⁷ J

We have;

E = h·f

∴ f = (2.24618 × 10⁻¹⁷ J)/(6.626 × 10⁻³⁴ J·s) = 3.38994869 × 10¹⁶ Hz

The speed of light, c = 299,792,458 m/s

From the equation for the speed of light, we have;

λ = c/f

∴ λ = (299,792,458 m/s)/(3.38994869 × 10¹⁶ Hz) = 8.84356919 nm ≈ 8.84 nm

The wavelength of the radiation that caused photoejection of the electron, λ\(_{causing \ radiation}\) ≈ 8.84 nm

(d) The kind of electromagnetic radiation used which has a wavelength of 8.84 nm is the X-Ray which are electromagnetic radiation having wavelengths that extend from 10 picometers to 10 nanometers.

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Answer:

that the polar bear will come out again in 2 years

Answer:

-3

Explanation:

The charge of the ion is determined by the number of protons and the number of electrons.

Protons are a positive + charge.

Electrons are a negative - charge.

We have 7 protons and 10 electrons.

+7 charge

-10 charge

-10 + 7 = -3 charge

the NaOH concentration is 0.07799 M.

we need to find out the NaOH concentration. For this, we'll use the formula for molarity of a solution. Molarity is defined as moles of solute per litre of solution. The formula for Molarity is:

Molarity (M) = Mass of solute in grams / Molar mass of solute × Volume of solution in liters.

So, we can rearrange the formula as:

M = (m/V) × (1/MW)

where M is the molarity of solution, m is the mass of solute, V is the volume of solution and MW is the molecular weight of the solute. Using this formula, we can calculate the NaOH concentration as follows:

Given, mass of KHP = 0.6986 g

Volume of NaOH = 43.92 mL = 0.04392 L

To find: NaOH concentration

Using the given mass of KHP, we can find the number of moles of KHP as:

moles of KHP = mass / molar mass of KHP= 0.6986 / 204.22= 0.003421 mol

Now, using the balanced chemical equation between NaOH and KHP, we can say that: 1 mole of NaOH reacts with 1 mole of KHP.

This means that the number of moles of NaOH used in the reaction = 0.003421 mol

So, using the formula for molarity, we can say that:

Molarity of NaOH = moles of NaOH / volume of NaOH= 0.003421 / 0.04392= 0.07799 M

Therefore, the NaOH concentration is 0.07799 M.

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Answer:

Ytterbium is a chemical element with the symbol Yb and atomic number 70. It is the fourteenth and penultimate element in the lanthanide

In this decay reaction, 31h is decaying into 32he+. The type of radiation that must be given off is an alpha particle, which is a helium nucleus consisting of two protons and two neutrons.

Alpha is a measure of an investment’s performance relative to a benchmark or a market index. It can be a measure of how much an investment has outperformed its benchmark, or conversely, how much it has underperformed its benchmark. Alpha is often referred to as a risk-adjusted return measure, as it adjusts for the amount of risk taken on by an investor. Alpha measures the performance of a portfolio or fund manager over and above the market’s performance, and is an important metric used by investors when assessing the quality of a portfolio manager. When used in combination with other measures of performance, alpha can help evaluate the success of a portfolio manager in generating returns in excess of a benchmark.

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