Question

The empirical formula of styrene is CH; its molar mass is 104.1 g/mol. What is the molecular formula of styrene

Answer 1

• The atomic mass of carbon is 12.011 g/mol.
• The atomic mass of hydrogen is 1.00794 g/mol.

This means the molar mass of CH is

`12.011+1.00794=13.01894 \text{ g/mol}`

Dividing the given molar mass by this,
`(104.1)/(13.01894) \approx 8`

This means the molecular formula is
`\boxed{\text{C}_(8)\text{H}_(8)}`