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Question

Which of the following could be an acceptable molecular mass of a compound with an empirical formula of CH2?

A
56 g/mol
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B
62 g/mol
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C
39 g/mol
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D
26 g/mol
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Solution

The correct option is B 56 g/mol
Let molecular formula of compound =(CH2)n=CnH2n
The molar mass of =CnH2n=n(12+2)=14n
Molar mass should be multiple of 14.
14n=56
n=4

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