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Ksenya-84 [330]
4 years ago
7

Which of the following is/are part of the nitrogen cycle?

Chemistry
1 answer:
Pachacha [2.7K]4 years ago
7 0
Denitrification is part of the nitrogen cycle 
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When water vapor is cooled, it re-forms into water droplets. Why does this represent a conservation in mass?
SVETLANKA909090 [29]
It represents a conservation in mass because the actual mass of water isn’t changing. The relationship between the molecules and the density of the water is. There is still the same amount of mass.
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If a gas is compressed from 4 L to 1 L and the temperature remains constant, what happens to the pressure?
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If T=const
P1V1=P2V2
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Which of the following has nonvolatile bonds
lord [1]

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I can provide a proper answer since there are no bonds specified.

Explanation:

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What was helium used for in the past?
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Calculate the equilibrium constant at 298 K for the reaction of formaldehyde (CH2O) with hydrogen gas using the following inform
Mariana [72]

Answer:

E. 8.08 x 10⁴.

Explanation:

Hello,

In this case, for the reaction:

CH_2O(g) + 2H_2(g)  \rightleftharpoons CH_4(g) + H_2O(g)

We can compute the Gibbs free energy of reaction via:

\Delta G\°=\Delta H\°-T\Delta S\°

Since both the entropy and enthalpy of reaction are given at 298 K (standard temperature), therefore:

\Delta G\°=-94.9kJ-(298K)(-224.2\frac{J}{K}*\frac{1kJ}{1000kJ} )\\\\\Delta G\°=-28.1kJ

Then, as the equilibrium constant is computed as:

K=exp(-\frac{\Delta G\°}{RT} )

We obtain:

K=exp(-\frac{-28.1kJ/mol}{8.314x10^{-3}\frac{kJ}{mol* K}}*298K )\\\\K=8.08 x10^4

For which the answer is E. 8.08 x 10⁴.

Best regards,

3 0
4 years ago
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