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

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Answer 1 · 2015-12-21T00:40:02

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

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 $"C"_3"H"_6"$ .

What is the molecular formula of a compound that has a molecular mass of 42 and an empirical formula of CH_2CH_2?