**Flashcard. S8P1f. Conservation of Matter in Reactions

Front

What do coefficients in a balanced chemical equation indicate?

Back

They indicate the number of molecules involved in the reaction.

Front

In a closed system, if the total mass of reactants is 25.0 grams, what will be the total mass of the products?

Back

Exactly 25.0 grams.

Front

What characterizes a closed system during a chemical reaction?

Back

It allows energy transfer but no matter exchange.

Front

What is conserved in a chemical reaction within a closed system?

Back

Mass and the number of atoms.

Front

How is the conservation of matter defined in a chemical reaction?

Back

Matter is conserved; the total mass of reactants equals the total mass of products.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What happens to the number of atoms in a chemical reaction?

Back

The number of atoms remains constant; they are rearranged to form products.

Front

What is a reactant in a chemical reaction?

Back

A substance that undergoes change during the reaction.

Front

What is a product in a chemical reaction?

Back

A substance that is formed as a result of a chemical reaction.

Front

What does it mean for a reaction to be balanced?

Back

The number of atoms for each element is the same on both sides of the equation.