Your answer should be B
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It means that a clock is broken twice
Answer/Explanation:
A chemical reaction is also known as a chemical change.
A chemical reaction occurs when one or more reactants change into new substances called products
There are a few changes that might accompany a chemical reaction including:
- a change in the color of the solution
- the formation of a gas, which might be visible through bubbles being produced
- a temperature change - often the chemical reaction will produce heat
- the formation of a precipitate - this means that particles that do not dissolve in the solution will form
- odor change - a different smell might be produced
- tlight given off - some reactions might produce a brighr ligh
