a $\mathrm{v}=\sqrt{\frac{\gamma \mathrm{RT}}{\mathrm{M}}}=\sqrt{\frac{1.4 \times 8.3 \times 273}{32 \times 10^{-3}}}$
$=314.8541 \simeq 315 \mathrm{~m} / \mathrm{s}$
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