Question

Fill in the blanks with the correct words from the brackets.
1. A substance that takes part in a chemical reaction is called a _____. (reactant/product)
2. A substance that is produced by a chemical reaction is called a _____. (reactant/product)
3. A chemical reaction always involves a change in _____. (energy/mass)
4. The reaction in which heat is absorbed are called _____.
(exothermic reaction/endothermic reaction)
5. The burning of natural gas is an _____. (exothermic reaction/endothermic reaction)​

Answer 1

Answer:

1))is called reactant

2))is called product

3))a chane in energy

4))is called endothermic reaction

5))is an exothermic reaction

Explanation:

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Answer 2

Answer:

1) product

2) reactants

3) mass

4) endothermic reaction

5) exothermic reaction