Posted by Anonymous on Tuesday, June 8, 2010 at 8:13pm.
consider 2 sample of nitrogen gas. sample 1 contains 1.5 mol of N2 and has a volume of 36.7L at 25C and 1 atm. sample 2 has a volume of 16.5L at 25C and 1 atm. calculate the number of moles of N2 in sample 2
do i use the pv= nrt equation? and do i only use the information given for sample 2 since you are finding moles in sample 2?
so you can ignore the info. for sample 1?

Chemistry  DrBob222, Wednesday, June 9, 2010 at 1:19pm
You can do this two ways.
One way is to use PV = nRT and, as you say, ignore sample 1.
(1 atm)(16.7 L) = n*0.08206*298 and solve for n, number of moles.
OR you can forget the PV = nRT and use the information from the two gases. I suspect the problem is trying to illustrate Avogadro's Law that equal volumes of gases at the same P and T contain equal number of molecules.
So if 1.5 mol are in the 36.7 L sample and we want to know moles in the 16.5 L sample, we can use the ratio
1.5 mol x (16.5/36.7) = ??
You should get the same answer either way.
Answer This Question
Related Questions
 Chemistry  A spherical glass container of unknown volume contains helium gas at...
 Chemistry  A sample of gas is confined to a cylinder housed with a movable ...
 Chemistry  A sample of air contains 78.8% nitrogen, 20.94% oxygen, 0.05% carbon...
 Chemistry  A sample of air was compressed to a volume of 18.0 L. The ...
 chemistry  A sample of an ideal gas at 1.00 atm and a volume of 1.61 L was ...
 chemistry  1)A sample of CO2 gas which weighs 0.85 grams has a volume of 1.30 ...
 Chemistry UPDATED QUESTION  A sample of air contains 78.08% nitrogen, 20.94% ...
 Chem hw!  1. What pressure would be needed to compress 25.1 mL of hydrogen at 1...
 Chem hw!  1. What pressure would be needed to compress 25.1 mL of hydrogen at 1...
 Chemistry  A rigid cylinder contains a sample of gas at STP. What is the ...
More Related Questions