Question

In water, the proportion of oxygen and hydrogen by mass is :

• A. 1 : 4
• B. 1 : 8
• C. 4 : 1
• D. 8 : 1

Answer 1

Wt of 1mole of hydrogen=1g

Wt of 1mole of oxygen= 16g

So water is 2H +O

So the ratio of the mass of H to O is

=Mass of 2H/mass of O

= (2 x 1)/16 = 2/16

=1/8

So the ratio of Hydrogen and Oxygen is 1:8 in the respective above order.