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Standard XII

Chemistry

Empirical & Molecular Formula

An organic co...

Question

An organic compound contains 20% carbon, 6.7% hydrogen, and 46.67% nitrogen. Its molecular weight was found to be 60. Find the molecular formula of the compound.

C H_{2} N O_{2}

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C H_{4} N_{2} O

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C H_{2} N_{2} O_{2}

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C H_{3} N_{2} O

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Solution

The correct option is B $C H_{4} N_{2} O$

Empirical formula weight = 12 + 4 = 28 + 16 = 60
Molecular mass = 60 (given)
Therefore, the empirical formula mass is same as the molar mass.
Hence, the molecular formula is $C H_{4} N_{2} O$ .

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Empirical & Molecular Formula

Standard XII Chemistry

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An organic compound contains 20% carbon, 6.7% hydrogen, and 46.67% nitrogen. Its molecular weight was found to be 60. Find the molecular formula of the compound.

The correct option is B CH4N2O Empirical formula weight = 12 + 4 = 28 + 16 = 60 Molecular mass = 60 (given) Therefore, the empirical formula mass is same as the molar mass. Hence, the molecular formula is CH4N2O.

The correct option is B $C H_{4} N_{2} O$

Empirical formula weight = 12 + 4 = 28 + 16 = 60
Molecular mass = 60 (given)
Therefore, the empirical formula mass is same as the molar mass.
Hence, the molecular formula is $C H_{4} N_{2} O$ .