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Q: What is the need to balance chemical equations?
  • A. To indicate the ratio of volumes of reactants and products in which these react
  • B. To satisfy the law of conservation of mass
  • C. To satisfy the law of constant proportions
  • D. To indicate the ratio of masses of reactants and products in which these react
Correct Answer: Option B - There is the need to balance a chemical equation to satisfy the law of conservation of mass. According to the law of conservation of mass, the mass of any substance in a chemical reaction is neither created nor destroyed. This means that the total mass of the substances before the reaction must be equal to the total mass of substance obtained after the reaction.
B. There is the need to balance a chemical equation to satisfy the law of conservation of mass. According to the law of conservation of mass, the mass of any substance in a chemical reaction is neither created nor destroyed. This means that the total mass of the substances before the reaction must be equal to the total mass of substance obtained after the reaction.

Explanations:

There is the need to balance a chemical equation to satisfy the law of conservation of mass. According to the law of conservation of mass, the mass of any substance in a chemical reaction is neither created nor destroyed. This means that the total mass of the substances before the reaction must be equal to the total mass of substance obtained after the reaction.