An evacuated glass vessel weighs 50.0g when empty148.0 g when filled w

1.	An evacuated glass vessel weighs 50.0g when empty148.0 g when filled with a liquid of density 0.98g mL and50.5 g when filled with an ideal gas at 760 mm Hg at 300 K.Determine the molar mass of the gas.-1(1998)
Answer» Weight of liquid = 148 – 50 =98 g Volume of liquid = 98/0.98 = 100 ml = volume of vessel it means, vessel of 100 ml contain ideal gas at 760 mm Hg at 300 K Weight of gas = 50.5 - 50 = 0.5g Using, PV = nRT = w/m RT 760/760 * 100/1000 = 0.5/m * 0.082 *300 [n = 0.5/m] ∴ Molecular weight of gas (m) =123 why did you divide 760 by 760

An evacuated glass vessel weighs 50.0g when empty148.0 g when filled with a liquid of density 0.98g mL and50.5 g when filled with an ideal gas at 760 mm Hg at 300 K.Determine the molar mass of the gas.-1(1998)

Answer»

Weight of liquid = 148 – 50 =98 g

Volume of liquid = 98/0.98 = 100 ml = volume of vessel it means, vessel of 100 ml contain ideal gas at 760 mm Hg at 300 K

Weight of gas = 50.5 - 50 = 0.5g

Using, PV = nRT = w/m RT

760/760 * 100/1000 = 0.5/m * 0.082 *300 [n = 0.5/m]

∴ Molecular weight of gas (m) =123

why did you divide 760 by 760