Question

Percentage composition of Hydrogen is 5.88% and Oxygen is 94.12%. its molecular formula is 34. find is empirical formula and molecular formula.

Answer 1

Answer:

Empirical formula is HO

Molecular formula is $H_{2}O_{2}$

Explanation:

The percentage composition of Hydrogen is 5.88% and Oxygen is 94.12%.

so we can take it as,

Mass of hydrogen = 5.88

The atomic mass of hydrogen = 1

therefore the number of moles of hydrogen = $\frac{5.88}{1} = 5.88$

Mass of oxygen = 94.12

The atomic mass of oxygen = 16

therefore the number of moles of oxygen = $\frac{94.12}{16} = 5.88$

The ratio between the number of moles of hydrogen and oxygen is 1:1

∴ Empirical formula is HO

Emperical formula mass is 17

We know, molecular formula mass is 34

∴ Molecular formula is $H_{2} O_{2}$