Question

$10$ g of hydrogen and $64$ g of oxygen were filled in a steel vessel and exploded. Amount of water produced in this reaction will be :

• A. $1$ mol
• B. $2$ mol
• C. $3$ mol
• D. $4$ mol

Answer 1

The correct option is D $4$ mol

The balanced chemical reaction is $2H_2+O_2\to 2H_{2}O$.

$10$ g of hydrogen will react with $\frac{10\times 32}{4}=80$ g of oxygen.

However, only $64$ g of oxygen is present.

Thus, oxygen is the limiting reagent.

$64$ g of $O_2\equiv \frac{64}{32}mol=2$ moles of oxygen will give $4$ moles of water.