Which describes the law of conservation of matter?
A. The total number of atoms cannot change during a reaction.
B. Chemical reactions cannot change reactants into products.
C. The reactants must have more atoms than the products.
D. A reaction has the same type of molecules before and after.

Matter cannot be created or destroyed. Instead, matter can be rearranged from one form to another. For example, boiling water turns the liquid into gas (steam) when it evaporates. The H2O molecules haven't been created or destroyed.

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Which describes the law of conservation of matter? A. The total number of atoms cannot change during a reaction. B. Chemical reactions cannot change reactants into products. C. The reactants must have more atoms than the products. D. A reaction has the same type of molecules before and after.

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Which describes the law of conservation of matter?
A. The total number of atoms cannot change during a reaction.
B. Chemical reactions cannot change reactants into products.
C. The reactants must have more atoms than the products.
D. A reaction has the same type of molecules before and after.