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Ideal Gas Equation

2H2 + O2→ 2H2...

Question

$2 H_{2} + O_{2} \to 2 H_{2} O$ . In the above equation, for $4 g$ of hydrogen _____ grams of $O_{2}$ is required.

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Solution

$2 H_{2} + O_{2} \to 2 H_{2} O$

Molecular mass of $H_{2} = 2 g / m o l$
Molecular mass of $O_{2} = 32 g / m o l$

From the balanced chemical equation,

$2 \times 2 = 4 g$ of hydrogen requires $32 g$ of Oxygen to react completely

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