Question

one molecule of calcium oxide, cao, and one molecule of carbon dioxide, co₂, combine in a chemical reaction to form one substance. given that matter is neither created nor destroyed, which chemical formula identifies the product of this reaction? (1 point)

o caco₃

o ca₂o₃

o ca₂co₃

o caco₂

Explanation:

Step1: Write the reactants

The reactants are $CaO$ and $CO_2$.

Step2: Apply law of conservation of mass

When they react, we combine the atoms. One $Ca$ atom from $CaO$, one $C$ atom from $CO_2$ and three $O$ atoms (one from $CaO$ and two from $CO_2$) combine.

Answer:

$CaCO_3$