Consider the equation H_2 + O_2 rightarrow H_2O. What volume of hydrogen gas is required to produce 1 mol of water at standard temperature and pressure?

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MDCAT Chemistry QUESTION #4375

Question 1

Consider the equation $H_2 + O_2 \rightarrow H_2O$. What volume of hydrogen gas is required to produce $1\ mol$ of water at standard temperature and pressure?

$11.2\ dm^3$
$22.4\ dm^3$✔️
$10\ dm^3$
$58\ dm^3$

Correct Answer Explanation

Balanced: $2H_2 + O_2 \rightarrow 2H_2O$. To produce $1\ mol\ H_2O$, we need $1\ mol\ H_2$. At STP, $1\ mol$ of any ideal gas occupies $22.4\ dm^3$. Answer: $22.4\ dm^3$.

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