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Some Basic Concepts of Chemistry
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11/08/2021 11:49 am
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The mass of N2F4 produced by the reaction of 2.0 g of NH3 and 8.0 g of F2 is 3.56 g. What is the percent yield?
2NH3 + 5F2→ N2F4 + 6HF
(a) 79.0
(b) 71.2
(c) 84.6
(d) None of these
1 Answer
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11/08/2021 11:53 am
Correct answer: (d) None of these
Explanation:
2NH3 + 5F2→ N2F4 + 6HF
2 x 17 g NH3 gives 66g N2F4
2 g will give - \(\frac{66}{34}\) x 2 = 3.88 g N2F4
% yield = \(\frac{3.56}{3.88}\) x 100
= 91.75%