life process

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Questions and Answers

What is the difference between a chemical reaction and a chemical equation?

A chemical reaction is a symbolic representation of a chemical equation, while a chemical equation is a process that changes one set of chemicals into another.
A chemical reaction is a reversible process, while a chemical equation is an irreversible process.
A chemical reaction is a physical change, while a chemical equation is a chemical change.
A chemical reaction is a process that changes one set of chemicals into another, while a chemical equation is a symbolic representation of a chemical reaction. (correct)

What does the Law of Conservation of Mass state in relation to chemical reactions?

The mass of the reactants is always greater than the mass of the products in a chemical reaction.
The total mass of the reactants must be equal to the total mass of the products in a chemical reaction. (correct)
The total mass of the reactants and products in a chemical reaction can vary.
The mass of the products is always greater than the mass of the reactants in a chemical reaction.

What is the purpose of balancing a chemical equation?

To speed up the chemical reaction.
To increase the yield of the products.
To change the products into reactants.
To ensure that the Law of Conservation of Mass is obeyed. (correct)

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Study Notes

What is the difference between a chemical reaction and a chemical equation? What does the Law of Conservation of Mass state in relation to chemical reactions? What is the purpose of balancing a chemical equation?