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Question
A sample of 0.177 g of an ideal gas occupies 1000 cm3 at STP. Calculate the rms speed of the gas molecules.
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Solution
Here,
V = 10-3 m3
Density = 0.177 kgm-3
P = 105pa
\[C = \sqrt{\frac{3P}{\rho}} = \sqrt{\frac{3 \times {10}^5}{0 . 177}}\]
\[ = 1301 . 9 {\text { ms }}^{- 1}\]
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