6. What does the law of conservation of mass state? a) Mass is created during chemical reactions, b) Mass is destroyed during chemical reactions. c) Mass is converted to energy during chemical reactions. d) Mass is conserved during chemical reactions.

## Step 1<br />The law of conservation of mass is a fundamental principle in chemistry. It states that in a closed system, the total mass of the substances involved in a chemical reaction does not change. This means that mass is neither created nor destroyed during a chemical reaction.<br /><br />## Step 2<br />The law of conservation of mass implies that the mass of the reactants (the substances that undergo the chemical reaction) is equal to the mass of the products (the substances that are formed as a result of the chemical reaction).<br /><br />## Step 3<br />The law of conservation of mass also implies that mass can be converted into other forms of energy during a chemical reaction. This is in line with the law of conservation of energy, which states that energy cannot be created or destroyed, only transformed.