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) ca₂o₃ caco₃ ca₂co₃ caco₂

Explanation:

Step1: Count atoms of reactants

• In \(CaO\): 1 Ca atom and 1 O atom.
• In \(CO_2\): 1 C atom and 2 O atoms.

Total: 1 Ca, 1 C, 3 O.

Step2: Check product formulas

• For \(Ca_2O_3\): 2 Ca, 3 O (incorrect).
• For \(CaCO_3\): 1 Ca, 1 C, 3 O (correct).
• For \(Ca_2CO_3\): 2 Ca, 1 C, 3 O (incorrect).
• For \(CaCO_2\): 1 Ca, 1 C, 2 O (incorrect).

Answer:

B. \(CaCO_3\)