`0.1 mol` of a carbonhydrate with empirical formula `CH_(2)O` contains `1 g` of hydrogen. What is its molecular formula?

Options

A. `C_(5)H_(10)O_(5)`
B. `C_(6)H_(12)O_(6)`
C. `C_(4)H_(8)O_(2)`
D. `C_(2)H_(4)O_(2)`

Answer

A

Explanation

0.1 mole of carbohydrated with empirical formula `CH_(2)O` contain 1g of hydrogen
`:.` 1 mole of carbohydrate will contain hydrogen = 10 g atoms
In `CH_(2)O` g atomic ratio of `C:H:O=1:2:1`
`:.` with 10 g atoms of H, g atoms of C combined with 5 g atoms of oxygen combined = 5
`:.` the molecular formula will be `C_(5)H_(10)O_(5)`