1) what is the density of methane (CH4) at a temp. of 20C and a pressure of 684mm.

2) a gas has a density of 2.5g/L at a temp. of 20C and a pressure of 1.1 atm. what is its molar mass.

asked by John
  1. I use the modified ideal gas equation for that. PM = dRT
    M = molar mass
    d = density
    T must be in kelvin

    posted by DrBob222

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