Question

all chemical equations must be balanced give reason

Answer 1

Answer:

According to law of conservation of mass, when a chemical reaction occurs, the mass of the products should be equal to mass of the reactants. Therefore, the amount of the atoms in each element does not change in the chemical reaction. As a result chemical equation needs to be balanced.

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Answer 2

According to law of conservation of mass, when a chemical reaction occurs, the mass of the products should be equal to mass of the reactants. Therefore, the amount of the atoms in each element does not change in the chemical reaction. As a result chemical equation needs to be balanced.