Question

which of these represents three molecules of carbon dioxide? 3co₂ 3c₃o₂ c₃o₆ 3c₂o

Explanation:

The chemical formula for carbon - dioxide is $CO_2$. To represent multiple molecules, a coefficient is placed in front of the formula. So, three molecules of carbon - dioxide is represented as $3CO_2$.

Answer:

A. $3CO_2$