What is the molecular formula of a compound that has a molecular mass of 42 and an empirical formula of #CH_2#?

1 Answer
Meave60
Dec 21, 2015

The molecular formula is #"C"_3"H"_6"#.

Explanation:

The empirical formula mass of #"CH"_2"# is 14 g/mol.

Divide the molecular mass by the empirical formula mass.

#42/14=3#

Multiply the subscripts of the empirical formula times three to get the molecular formula.

The molecular formula is #"C"_3"H"_6"#.

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