Question

5)
» A change in
means that a chemical reaction has occurred.

Answer 1

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Step-by-step explanation:

Chemical changes occur when bonds between atoms are broken and new bonds form. As a result, new substances are produced. There are four signs that a chemical reaction has occurred: a change in color, a change in temperature, formation of a gas or formation of a precipitate.

Answer 2

C) the properties and identity of the reacting substances

Step-by-step explanation:

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