The speed of sound in oxygen at S.T.P. will be approximately:
(Given, $R=8.3 JK^{-1}, \gamma=1.4$ )
(1) $310 m / s$
(2) $333 m / s$
(3) $341 m / s$
(4) $325 m / s$
$v=\sqrt{\frac{\gamma RT}{M}}=\sqrt{\frac{1.4 \times 8.3 \times 273}{32 \times 10^{-3}}}$
$=314.8541 \simeq 315 m / s$
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