A Sample of neon is collected at 2.7 atm and 12.0 C. It has a volume of 2.25 L. What would be the volume of this gas at STP. It says that i have to use the combined gas law,but i do not know if i should plugs these number in for P1V1/T1 or P2V2/T2 help thank you

Question

anonymous · Answer

you use both equations:
p1V1/T1=p2V2/T2 and now you calculate from that equation V2

anonymous · Answer

did you get it? just put in this equation numbers:
V2= p1V1T2/p2T1

anonymous · Answer

I somewhat get it. my question really regards what the question would ask for, in what sitituation would i know where to plug the numbers in?

anonymous · Answer

not sure if i get what you mean but you can use that equation when there is no change in moles...