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Some Basic Concepts of Chemistry
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12/08/2021 11:27 am
Topic starter
On subjecting 10 mL mixture of N2 and CO to repeated electro spark, 7 mL of O2 was required for combustion. What was the mole percent of CO in the mixture? (All volumes were measured under identical conditions)
(a) 60
(b) 40
(c) 6
(d) 4
1 Answer
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12/08/2021 11:32 am
Correct answer: (a) 60
Explanation:
N2 + O2 → 2NaOH
a a 2a
CO + \(\frac{1}{2}\)O2 → CO2
(10 - a) \(\frac{(10 - a)}{2}\) (10 - a)
a + \(\frac{(10 - a)}{2}\) = 7
∴ a = 4
volume of CO = 6 mL
Mole % of CO = \(\frac{6 \times 100}{10}\) = 60