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What must be the same on the reactant and product sides of a balanced chemical equation?

Answer and explanation

Correct answer: Number of atoms of each element

In a balanced chemical equation, the number of atoms of each element is the same on both sides because of the law of conservation of mass. For example, in \(2H_2 + O_2 \rightarrow 2H_2O\), both sides contain 4 hydrogen atoms and 2 oxygen atoms. The total number of molecules need not be the same: here there are 3 molecules on the left and 2 on the right.

Related tags

Class 10 ScienceChemical ReactionsBalanced EquationsConservation Of MassChemical Equations

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