A noble gas is placed in a 10.0 liter container. The noble gas has a mass of 25.25 g, the pressure is 3.05 atm, and the temperature is 24°C. Find the molar mass and symbol for the gas. ?

1 Answer
anor277
May 14, 2018

I makes it.....#"neon gas, Ne.........."#

Explanation:

We work out the molar mass of the gas...#PV=nRT# #=# #"mass of gas"/"molar mass of gas"xx0.0821*(L*atm)/(K*mol)xx297.15*K.#

And so....#"molar mass of gas"="mass of gas"/(PxxV)xx0.0821*(L*atm)/(K*mol)xx297.15*K#

#=(25.25*g)/(3.05*cancel(atm)xx10.0*cancelL)xx0.0821*cancel(L*atm)/(cancelK*mol)xx297.15*cancelK#

#=20.2*g*mol^-1#

And this molecular mass is precisely consistent with that of neon gas.... I hope the question drew on actual data....the fit makes me suspicious.....

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