|Class 9 Chemistry Atoms and Molecules||Laws of constant proportion|
Laws of constant proportion
The law states that in a chemical substances the elements are always present in a definite proportion by mass. It is also termed as law of definite proportion.
For instance, the ratio of hydrogen and oxygen in water obtained from any source is 1:8 i.e. 1g of hydrogen and 8g of oxygen together make up 9g of water.
Similarly the ration of nitrogen and hydrogen in ammonia is 14:3.