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A compound has `20%` of nitrogen by weight. If one molecule of the compound contains two nitrogen atoms, the molecular weight of the compound is

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A compound has `20%` of nitrogen by weight. If one molecule of the compound contains two nitrogen atoms, the molecular weight of the compound is
A. 35
B. 70
C. 140
D. 280
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Correct Answer - C
`%N = ("No. of N-atoms" xx "At. Wt of"N)/(GMW "of molecule") xx 100`
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