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Neporo4naja [7]
3 years ago
12

Which substance in the reaction below either appears or disappears the fastest? 4NH3 + 7O2 → 4NO2 + 6H2O Which substance in the

reaction below either appears or disappears the fastest? 4NH3 + 7O2 4NO2 + 6H2O H2O NO2 O2 NH3 The rates of appearance/disappearance are the same for all of these.
Chemistry
1 answer:
GREYUIT [131]3 years ago
7 0

Answer:

Oxygen will disappear the fastest as 7 moles is the largest stoichiometric coefficient,

Explanation:

Oxygen would disappear 7/4 times as Ammonia

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Rank the solutions in order of decreasing [H3O ]. Rank solutions from largest to smallest hydronium ion concentration. To rank i
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Answer:

0.10M HCN  <  0.10 M HClO  <  0.10 M HNO₂  < 0.10 M HNO₃

Explanation:

We are comparing acids with the same concentration. So what we have to do first is to determine if we have any strong acid and for the rest ( weak acids ) compare them by their Ka´s ( look for them in reference tables ) since we know the larger the Ka, the more Hydronium concentration will be in these solutions at the same concentration.

HNO₃ is a strong acid and will have the largest hydronium concentration.

HCN  Ka = 6.2 x 10⁻¹⁰

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The ranking from smallest to largest hydronium concentration will then be:

0.10M HCN  <  0.10 M HClO  <  0.10 M HNO₂  < 0.10 M HNO₃

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