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Calculate the number of molecules in one litre of gas at N.T.P., if mass of each molecule is `4.55 xx 10^-25 kg` and its R.M.S. velocity at N.T.P. is `350 m//s` (P = `10^5N//m^2`).

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CHETANA PUBLICATION-Kinetic Theory of Gases and Radiation-Exercise
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