`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_(4)`
D. `C_(3)H_(6)O_(3)`

Answer

A

Explanation

0.1 mole of carbohydrate with E.F. `CH_(2)O` contains 1 g of hydrogen.
`therefore "1 mole of carbohydrate will contain hydrogen"`
= 10 g = 10 g atoms
In `CH_(2)O`, g atomic ratio of `C:H:O=1:2:1`
`therefore" With 10 g atom of H, g atoms of C combined"`
`="5 and g atoms of O combined = 5. Hence, actual formula (molecular formula) will be "C_(5)H_(10)O_(5)`.