8. What is the molecular formula of a compound with an empirical formula of CH, and a molecular mass of 42 grams/mole?

The molecular formula : C₃H₆

Given

The empirical formula : CH₂

The molecular mass = 42 g/mole

Required

The molecular formula

Solution

The empirical formula is the smallest comparison of atoms of compound forming elements.

A molecular formula is a formula that shows the number of atomic elements that make up a compound.

(empirical formula) n = molecular formula

(CH₂)n=42 grams/mole

(12+2.1)n=42 grams/mole

(14)n = 42 grams/mole

n = 3

(CH₂)₃=C₃H₆

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