**Flashcard. S8P1f. Conservation of Matter in Reactions

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that in a closed system, the mass of the reactants is equal to the mass of the products in a chemical reaction.

Front

In the reaction @@2KClO_3 ightarrow 2KCl + 3O_2@@, how does the law of conservation of mass apply?

Back

Front

How many hydrogen atoms are in the reactants of the equation @@CH_4 + 2O_2 ightarrow CO_2 + 2H_2O@@?

Back

There are 4 hydrogen atoms in the reactants.

Front

What happens to atoms during a chemical reaction?

Back

Atoms of the reactants recombine to form new products.

Front

Why is the mass of the products equal to the mass of the reactants?

Back

Because atoms are rearranged but not created or destroyed.

Front

Back

It represents the number of molecules produced.

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes change during a chemical reaction.

Front

What is a product in a chemical reaction?

Back

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

Front

What does it mean to balance a chemical equation?

Back

Balancing a chemical equation means ensuring that the number of atoms for each element is the same on both sides of the equation.

Front

What is the significance of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance involved in the reaction.