Question

In: Chemistry

Determine the molecular formula for the unknown if the molecular mass is 60.0

Determine the molecular formula for the unknown if the molecular mass is 60.0 amu and the empirical formula is CH2O .

 

Solutions

Expert Solution

When you have the empirical formula, the molar mass is the molecular formula will be a whole number multiple of the molar mass of the empirical formula.
For your empirical formula, the molar mass is 12+2(1)+16= 30 amu.
Given a molecular mass of 60, your molecular formula will be 60/30=2 times your empirical formula: C2H4O2

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