12 grams of carbon combines with 32 grams of oxygen to form CO₂

The chemical changes in which two or more substances combine to give a new compound is called 

Law of definite proportion was proposed by

John Dalton proposed the law 

When two or more elements combine to form a compound, they combined in a fixed ratio of their weights. This law is

The white ash formed when magnesium ribbon is burnt

The weight of one element that seperately combines with a fixed weight of another element bear a simple integral ratios. This law is

Hydrogen combines with oxygen to produce water and hydrogen peroxide. This illustrates

The sum of masses of substances before and after a chemical reaction remains constant. This law is 

Zn + CuSO₄ → ZnSO₄ + Cu. This reaction follows the law