There are `6 xx 10^(21)` hydrogen molecules in a vessel of volume `200 cm^(3)`. Its tempera-ture is `27^(@)C` and the pressure is `10^(5) Nm^(-2)`. If the temperature be raised to `47^(@)C`, then in what ratio the following qunatities would change (i) number of molecules per unit volume (ii) pressure of the gas is the vessel and (iii) average kinetic energy of hydrogen ?

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Correct Answer - (i) It remains unchanged `(3 xx 10^(19) "per cm"^(3))` , (ii) `15 : 16` , (iii) `15 : 16`

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