Predict the missing component of each reaction

 1.

2.

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

1. Decomposition is a type of chemical reaction in which one reactant gives two or more than two products.

Thus in balanced chemical decomposition of , the missing component is .

2. Synthesis is a type of chemical reaction in which two reactants combine to give a single product.

Thus in balanced synthesis reaction of , the missing component is .

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