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2 years ago

Help Pls pls I will give brainlist

Chemistry

2 answers:

Harrizon [31]2 years ago

6 0

1. B
2. C = 18
H = 36
O = 2
3. B
4. C
5. O = 6
6. Yes

LuckyWell [14K]2 years ago

5 0

C=18
H=36
O=2
hope this helps

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Which macromolecules break apart by hydrolysis?

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Answer:

Dehydration synthesis reactions build molecules up and generally require energy, while hydrolysis reactions break molecules down and generally release energy. Carbohydrates, proteins, and nucleic acids are built up and broken down via these types of reactions, although the monomers involved are different in each case.

Explanation:

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Acetylene, C2H2, can be converted to ethane, C2H6, by a process known as hydrogenation. The reaction is C2H2(g) + 2H2(g) ⇌ C2H6(

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Answer:

-255.4 kJ

Explanation:

The free energy of a reversible reaction can be calculated by:

ΔG = (ΔG° + RTlnQ)*n

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C₂H₂(g) + 2H₂(g) ⇄ C₂H₆(g)

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Q = 3.2487x10⁻³

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3 years ago

How does the average speed of air molecules relate to the air temperature?

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Temperature is defined as the rate at which molecules move or vibrate

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For the cell constructed from the hydrogen electrode and metal-insoluble salt electrode, B) calculate the mean activity coeffici

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Question:

For the cell constructed from the hydrogen electrode and metal-insoluble salt electrode, B) calculate the mean activity coefficient for 0.124 b HCl solution if E=0.342 V at 298 K

Answer:

The mean activity coefficient for HCl solution is 0.78.

Explanation:

Activity coefficient is defined as the ratio of any chemical activity of any substance with its molar concentration. So in an electrochemical cell, we can write activity coefficient as γ. The equation for determining the mean activity coefficient is

$E=E_{0}-0.0514 \mathrm{V} \ln \gamma$

As we know that $E_{0}$ = 0.22 V and E = 0.342 V, the equation will become

$0.342 V+0.0514 V \ln (0.124)=0.22 V-0.0514 V \ln \gamma$

$0.342 V-0.222 V=-0.0514 V(\ln \gamma+\ln 0.124)$

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$\frac{0.12}{0.0514}=-\ln (0.124 \gamma)$

$-2.3346=\ln (0.124 \gamma)$

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ΔH - changes in enthalpy.
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T is temperature in Kelvins.
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