Question

Two oxides of a metal contain 63.2% and 69.62% of the metal. The specific heat of the metal is 0.117. What is the formula of the two oxides?

Answer 1

MO₂ & M₂O₃ 

Approximate atomic mass = 6.4 / 0.117 = 54.7 

For first oxide 63.2 g metal combines with 36.8 g oxygen 54.7 g metal combines with 

So 1 mole atom of metal combines with 2 mole atoms of O Formula is MO₂ 

For second oxide 69.62 g metal combines with 30.38 g oxygen

54.7 g metal combines with 

So 1 mole atom of metal combines with 1.5 mole atoms of O Formula is M₂O₃