Question
1.)
1. How do we know when a chemical reaction is taking place? Can you think of an example of how each of the five senses (sight
might be used in detecting when a chemical reaction has taken place?
7.)
7. What are the substances to the left of the arrow in a chemical equation called? To the right of the arrow? What does the a
9.)
9. In a chemical reaction, the total number of atoms present after the reaction is complete is (larger than/smaller than/the
11.)
11. Why are the physical states of the reactants and prod- ucts often indicated when writing a chemical equa- tion?
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Answer #1

Chemical reaction occurs by chemical change. Changes in which atoms rearrange themselves by combining! exchange or break aparw Gas production! Some produce gas as a eg zu & H₂SO4 chernical reactions product zusoy & the on gas.

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