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If 20% nitrogen is present in a compound, its molecular weight will be

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If 20% nitrogen is present in a compound, its molecular weight will be

(a) 144

(b) 28

(c) 100

(d) 70

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Correct option is (d) 70

Assuming that a molecule of the compound contains at least one nitrogen atom, then 

Molecular mass of the compound = \(\frac{100\times 14}{20}\) = 70 

Thus, molecular mass of the compound is either 70 or multiple of it.

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