Given a sample of gas (2.49 g) with a volume of 752 mL at 335K and 1.98 atm, what is the gas, SO2 or NO2?
PV=nRT
(1.98atm)(0.752L)= X (0.08206L-atm/mol-K)(335K)
X = 0.0541634989
mol= g/gfm
2.49/X= 0.0541634989
X = 45.97
NO2 has 46g, whereas SO2 is 64.1g.
Therefore, would the solution be NO2?
1 answer
NO2 is correct but you have too many s.f. again. You are allowed three s.f., (from the 1.98) so the answer of 45.97 would round to 46.0 = molar mass.
1 answer