1.0g of an oxide of A contained 0.5g of A. 4.0g of another oxide of A contained 1.6g of A. The data indicate the law of ?

According to law of multiple proportions, if two elements combines to form more than one compound, then the masses of one element that combine with a fixed mass of the other element, are in the ratio of small whole numbers.

In the given problem, A with mass of 0.5 g forms an oxide having mass,1.0 g and same element, A with mass 1.6 g forms another oxide of mass 4.0 g.

Element with fixed mass = Oxygen

Element with different masses = A