Question #3f2c0

1 Answer
May 17, 2016

P.MM= d.R.T

Explanation:

Use the ideal gas equation

P.V=n.R.T

P.V= m/(MM).R.T

P.MM= m/V.R.T

P.MM= d.R.T

P" is the pressure of the gas (" atm")"
MM" is the molar mass ("g.mol^-1")"
d" is the density of the gas ("g.L^-1")"k
R" is the universal gas constant ("0.0821L.\atm.mol^-1.K^-1")"

Solve for MM

MM= (d.R.T)/P

MM= (1.8g.L^-1*0.0821L*\atm*mol^-1*K^-1*300.*K)/((760mmHg*(1.\atm)/(760*mmmHg))

MM ~= 44 " "g.mol^-1