Question

The reacting substance which gets used up first in the reaction is called the che​

Answer 1

Answer:

The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.

Explanation:

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Answer 2

Answer:

The reactant that is completely used up (while some amount of the others may still remain) is called the limiting reactant.

Explanation:

The limiting reactant is named what it is because it is what limits the chemical reaction. Since it gets used up first, it must produce the least amount of product, and adding more would allow for more of the reaction to occur.