a. How many moles of N2 are present in a 1.00 qt flask that has a pressure of 425 torr at a temperature of 35°C?
What is the mass in this na2?
It would be much simpler to change quart to liters first, then torr to kpa
PV=nRT
n= PV/RT Temps in Kelvins, V in liters, P in kpa
1L=1.06qt
1.00 / 1.06 = 0.94339623
425 torr = 56.7 kpa
35= 308.15 k
56.7/0.0821*308.15 = 212814.921
Not sure what I'm doing wrong
You're STILL using 0.0821 for R and I distinctly remember saying when you use P in kPa R must be 8.314. To make things a little easier you could have changed to 0.946 L also.
P actually is 56.66 but rounding to 56.7 should be ok.
n = PV/RT
n = 56.7*0.946/(8.314*308)
n = about 0.02