Answer
$218.67\frac{m}{s}$
Work Step by Step
We can find the root square speed as
$u=\sqrt{\frac{3RT}{M}}$
We plug in the known values to obtain:
$u=\sqrt{\frac{3\times 8.31\times 295}{153.8\times 10^{-3}}}=218.67\frac{m}{s}$
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