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4 years ago

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The cell wall in plants functions to prevent the cell membrane from breaking when too much water enters the cell. When too much

water enters an animal cell, it is reasonable to predict that - 10 points

1 answer:

Gnoma [55]4 years ago

8 0

Answer:

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What reaction is depicted by the given equation: Au3+ + 3e− Au

mr Goodwill [35]

Reduction. B is the correct answer

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4 years ago

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1.00 L of a gas at STP is compressed to 473mL. What is the new pressure of gas?

Ratling [72]

Hello!

1.00 L of a gas at STP is compressed to 473 mL. What is the new pressure of gas?

<u><em>We have the following data:</em></u>

Vo (initial volume) = 1.00 L

V (final volume) = 473 mL → 0.473 L

Po (initial pressure) = 1 atm (pressure exerted by the atmosphere - in STP)

P (final pressure) = ? (in atm)

<u><em>We have an isothermal transformation, that is, its temperature remains constant, if the volume of the gas in the container decreases, so its pressure increases. Applying the data to the equation Boyle-Mariotte, we have:</em></u>

$P_0*V_0 = P*V$

$1*1 = P*0.473$

$1 = 0.473\:P$

$0.473\:P = 1$

$P = \dfrac{1}{0.473}$

$\boxed{\boxed{P \approx 2.11\:atm}}\:\:\:\:\:\:\bf\green{\checkmark}$

<u><em>Answer: </em></u>

<u><em>The new pressure of the gas is 2.11 atm </em></u>

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3 years ago

What are the physical properties of chlorine?<br>

Sonbull [250]

Answer:

The Physical Properties of Chlorine are as follows:

Color: Greenish-yellow.

Phase: Gas.

Odor: Disagreeable, suffocating smell.

Density: About two and one-half times as dense as air.

Solubility: Is soluble in water. ...

Boiling Point: The boiling point of chlorine is –34.05°C.

Melting Point: The melting point is –101°C.

Explanation:

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Rank these elements according to first ionization energy. Sb, As, P, N

kogti [31]

Highest ionization energy to lowest: N, P, As, Sb.

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4 years ago

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In a generic chemical reaction involving reactants A and B and products C and D, aA + bB → cC + dD, the standard enthalpy ΔH∘rxn

velikii [3]

Answer:

A. ΔH∘rxn = 21.9 KJ/mol

B. ΔH∘rxn = 103 KJ/mol

C. C2H5OH + 3O2 → 2CO2 + 3H2O

Explanation:

A.

The standard reaction equation is given as:

aA + bB → cC + dD

Its standard enthalpy is given as:

ΔH∘rxn = cΔH∘f(C) + dΔH∘f(D) − aΔH∘f(A) − bΔH∘f(B)

Reaction given to us is:

H2O(l) + CCl4(l) → COCl2(g) + 2HCl(g)

So, its standard enthalpy will be:

ΔH∘rxn = (1)ΔH∘f(CoCl2 (g)) + (2)ΔH∘f(HCl(g)) − (1)ΔH∘f(H2O(l)) − (1)ΔH∘f(CCl4(l))

using the values from table:

ΔH∘rxn = - 218.8 KJ/mol + (2)(- 92.3 KJ/mol) - (- 285.8 KJ/mol) - (- 139.5 KJ/mol)

<u>ΔH∘rxn = 21.9 KJ/mol</u>

<u></u>

B.

Reaction given to us is:

2A + B ⇌ 2C + 2D

So, its standard enthalpy will be:

ΔH∘rxn = (2)ΔH∘f(C) + (2)ΔH∘f(D) − (2)ΔH∘f(A) − (1)ΔH∘f(B)

using the values from table:

ΔH∘rxn = (2)181 KJ/mol + (2)(- 523 KJ/mol) - (2)(- 225 KJ/mol) - (- 337 KJ/mol)

<u>ΔH∘rxn = 103 KJ/mol</u>

<u></u>

C.

Balanced equation for combustion of ethanol is:

<u>C2H5OH + 3O2 → 2CO2 + 3H2O</u>

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3 years ago