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Question

The empirical formula of a compound is CH2. One mole of this compound has a mass of 42 g. Its molecular formula is:

A
CH2
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B
C2H2
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C
C3H6
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D
C3H8
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Solution

The correct option is D C3H6
The empirical formula is CH2. Therefore, the empirical weight = 14.
Given, the molecular weight =42 g.

x=Molecular weightEmpirical weight=4214=3

Molecular Formula=(Empirical Formula)x

Molecular Formula=(CH2)3=C3H6

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