A binary compound of carbon and hydrogen has the following percentage composition: 79.89% carbon, 20.11% hydrogen by mass. If

Question

A binary compound of carbon and hydrogen has the following percentage composition: 79.89% carbon, 20.11% hydrogen by mass. If the molar mass of the compound is determined by experiment to be between 30 and 31 g/mol, what are the empirical and molecular formulas of the compound?
Empirical formula:
Molecular formula:

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