The substances present before a chemical reaction takes place are called?

2 answers:

5 0

The substances present before the reaction are the reactants. (As the reaction goes through, the substances that are produced are called the products of the reaction).

jeka57 [31]3 years ago

5 0

Reactants. just did the penn foster exam

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Explanation:

Hello,

In this case, since the undergoing chemical reaction is:

$CaCO_3(s)\rightarrow CaO(s)+CO_2(g)$

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$m_{CaCO_3}=1.79x10^{-3}molCO_2*\frac{1molCaCO_3}{1molCO_2} *\frac{100g CaCO_3}{1molCaCO_3}\\ \\m_{CaCO_3}=0.179gCaCO_3$

Regards.

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