Question

What are the 2 laws of chemical combination? define​

Answer 1

Answer:

Law of Chemical Combination

(1) Law of Conservation of Mass

In a chemical change, total mass remains conserved. i.e. mass before the reaction is equal to mass after the reaction

H 2 (g)+Cl 2 (g)⟶2HCl

Mass before reaction=2+71=73g

Mass after reaction=2x36.5=73g

(2) Law of constant or Definite Proportions

All Chemical compounds are found to have constant composition irrespective of their method of preparation or source.

For g. in water (H 2O), hydrogen and oxygen combine in 2:1 molar ratio, this ratio remains constant whether it is tap water or river water.

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