Question

$36grams$ of carbon and $32grams$ of oxygen gas react to form carbon dioxide. What is the limiting reagent?

• A. There is no limiting reagent.
• B. Carbon in limiting.
• C. Oxygen gas is limiting.
• D. The oxygen and hydrogen are both limiting.

Answer 1

Answer: (C)

Oxygen gas is limiting.

$C\left(s\right)+O_2\to C{O}_2\left(g\right)$

No. of moles of carbon $=\frac{36}{12}=3moles$

No. of moles of oxygen $=\frac{32}{32}=1moles$

So, $2moles$ of carbon is left and oxygen will be completed.

So, $O_2$ is limiting reagent.