Question

a metal oxide has 40% oxygen.The equivalent weight of the metal is-

a-12 b-16 c-24 d-48

Answer 1

40%of oxygen
In 100g 40g of oxygen and 60g of metal
So
60÷40=x÷8
x=12

Answer 2

Answer: Thus equivalent mass of metal is 12 gram.

Explanation:

Equivalent mass of a metal is defined as the mass which combines with 8 gram of oxygen or 35.5 grams of chlorine or 1 gram of hydrogen.

Given:

metal oxide has 40% oxygen

Thus if Mass of metal oxide = 100 g

mass of oxygen = 40 g

Thus mass of metal = Mass of metal Oxide - mass of oxygen = ( 100-40) g= 60 g

40 gram of oxygen combine with = 60 g of metal

So 8 gram of oxygen combines with =$\frac{60}{40}\times 8=12g$ of metal

Thus equivalent mass of metal is 12 gram.