1.22 g of a gas measured over water at 15°C and a pressure of 775 mm of Hg Occupied 900 ml. Calculate the volume of dry gas at vapour pressure of water at `15^(@)C` is 14 mm of Hg

Options

A. 372.21 mL
B. 854.24 mL
C. 869.96 mL
D. 917.76 mL

Answer

B

Explanation

Pressure of dry gas = Pressure of moist gas - Vapour pressure of water = 775 - 14 = 761 mm
From , `(p_(1) V_(1))/(T_(1)) = (p_(2) V_(2))/(T_(2)) implies V_(2) = (p_(1) V_(1) T_(2))/(T_(1) p_(2)) = (761 xx 900 xx 273)/(288 xx 760) = 854.24 `mL