Question

The ratio of molecular weight of Hydrogen and Oxygen in water is $1:8$. Find quantity of oxygen if hydrogen is $\frac{3}{2}$ gms?

Answer 1

Given : The ratio of molecular weight of Hydrogen and Oxygen in water is $1:8$ Amount of hydrogen is $3/2$ gms.

Solution:

Let amount of hydrogen be x gms, then amount of oxygen will be $8x$

But amount of hydrogen is given to be $3/2$ gms, i.e

$x=3/2gms$

so amount of oxygen $=8\times 3/2gms$

$=4\times 3gms$

$=12gms$

Therefore, amount of oxygen is $12$ gms.