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An electric bulb of volume 250cc was sea...

An electric bulb of volume 250cc was sealed during manufacturing at a pressure of `10^(-3)`mm of mercury at `27^(@)`C. Compute the number of air molecules contained in the bulb.Avogadro constant `=6xx10^(23)mol^(-1),` density of mercury`=13600kgm^(-3)and g=10ms^(-2)`.

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