Chemical Reactions

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The mass of the products equals the mass of the reactants in the Law of

Which of the following is NOT evidence of a chemical change?

The number 4 in the reactant 4NaCl represents

This type of reaction has only one reactant

When balancing chemical equations, be sure that that you balance the number of ____ on both sides.

You can calculate the mass of an atom by adding the number of

This type of reaction always includes a diatomic oxygen molecule.

In the equation 2Na + Cl2 ---> 2NaCl, the NaCl is the