Question

Calculate the partial pressures and total pressure (in atm) exerted by 0.838 mol of methane, 0.184 mol of ethane and 0.755 mol of neon contained in a 4.00 L container at 27 C.

PV=nRT for methane
(4.00L) X = (0.838 mol)(0.08206 L-atm/mol-K)(300.15 K)
X = 5.160 atm

PV=nRT for ethane
(4.00L) X = (0.184 mol)(0.08206 L-atm/mol-K)(300.15 K)
X = 1.133 atm

PV=nRT for neon
(4.00L) X = (0.755 mol)(0.08206 L-atm/mol-K)(300.15 K)
X = 4.649 atm

Total Pressure: 5.160atm + 1.133atm + 4.649atm = 10.942 atm

Correct?

Answer 1

The numbers are ok and the method is correct; however, you have too many significant figures in the answer (for each and for the total).

Answer 2

So, for methane, would it be 5.16 atm; ethane 1.13 atm; neon 4.65 atm; giving a total pressure of 10.94 atm?

Answer 3

That's right.

Answer 4

Great, thanks