How to find moles in nitrogen at STP?

Can someone please assist with this question:





One cubic foot of volume equals 28.3 L. How many moles of nitrogen are in 1.00 ft3 of nitrogen gas at STP?





Thank you in advance!How to find moles in nitrogen at STP?
Avagadro's law says that at STP, I mol gas = 22.4 L of that gas. So, if you divide 28.3 L/22.4 L, you get 1.26 moles.How to find moles in nitrogen at STP?
If 1 cubic foot equals 28.3 Liters, then there are 28.3 liters of nitrogen gas at STP. So you use the ideal gas law equation PV=nRT to calculate the number of moles of Nitrogen.


At STP (standard temperature and pressure), P(pressure)=1 atm, T(temperature)=273 K, and R=0.08206 L*atm/mol*K (the gas constant). V (volume) equals the 28.3 Liters you are given.





Your equation should look like this: (1)(28.3)=n(0.08206)(273)


Just solve for n to get the number of moles of nitrogen.





*haha I guess I did it the long way, the one above works fine too...*