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Calculate the number of molecules is 1cm...

Calculate the number of molecules is `1cm^3` of an ideal gas at `27^@C`. Temperature and 20 mmHg pressure. The average kinetic energy of one molecule of the gas at `27^@C=4 times 10^-14 erg`, density of mercury =`13.6 g.cm^-3`

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The correct Answer is:
`9.996 times 10^17`
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