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.

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