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bixtya [17]
3 years ago
5

True or False. Ecosystems are always very large and cover a large amount of land.

Chemistry
1 answer:
Rainbow [258]3 years ago
3 0

False is the answer

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A certain amount of H2S was added to a 2.0 L flask and allowed to come to equilibrium. At equilibrium, 0.072 mol of H2 was found
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Answer:

0.098 moles H₂S

Explanation:

The reaction that takes place is

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We can express the equilibrium constant as:

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With the volume we can <u>calculate the equilibrium concentration of H₂</u>:

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<em>The stoichiometric ratio</em> tells us that <u>the concentration of S₂ is half of the concentration of H₂</u>:

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Now we <u>can calculate [H₂S]</u>:

  • 7.5 = [H₂S]² / (0.018*0.036²)
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So 0.013 M is the concentration of H₂S <em>at equilibrium</em>.

  • This would amount to (0.013 M * 2.0 L) 0.026 moles of H₂S
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Initial moles of H₂S - Moles of H₂S that reacted into H₂ = Moles of H₂S at equilibrium

Initial moles of H₂S - 0.072 mol = 0.026 mol

Initial moles of H₂S = 0.098 moles H₂S

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