A hydrocarbon X with a molar mass of 26 consists of 92.3% carbon. What is...

A hydrocarbon X with a molar mass of 26 consists of 92.3% carbon. What is its molecular formular?

The correct answer is: A

% of H2 = 100 - 92.3 = 7.7%
mole = Carbon [92.3 / 12] = 7.7

Hydrogen [7.7 / 1] = 7.7

divide with the lowest:

Carbon - 7.1 / 7.1 = 1

Hydrogen - 7.1 / 7.1 = 1

empirical formula = CH

(CH)n = 26
(12 + 1)n = 26
(13)n = 26
n = 26/13 = 2

molecular formula = C\(_2\)H\(_2\)

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