Question

. It changes during a chemical
reaction. (11)​

Answer 1

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During a chemical change, the composition of matter always changes. Four possible clues to chemical change include a transfer of energy, a change in color, the production of a gas, or the formation of a precipitate. During any chemical reaction, the mass of the products is always equal to the mass of the reactants.

Answer 2

Answer:

reactants change during a reaction to form products