What weight of hydrogen at STP could be contained in a vessel that holds $3.36 L O_{2}$ gas at STP?

0.21

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4.8

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0.30

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3.36

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Solution

The correct option is A $0.21$ g
Molecular mass of $H_{2}$ = $2 \times 1 = 12$ $= L O_{2}$
$L = 6.91$
$O_{2} = 2 \times 16$ $= 32$
$L O_{2} =$ $\frac{3.36}{222.112}$ $= 0.015127$
Therefore,
$H_{2}$ mass of $0, 15$ moles $= 0.015127 \times 15$ $= 0.226 g$

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