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Hey!!!

I just got finished at school w/ AP. Chemistry and we worked w/ the ideal gas law PV=nRT.

This is how I worked it out and I also got the same answer as you did:

PV=nRT

(3atm)(5L)=n(0.0821)(285K)

15=n(23.3985)

n=15/23.3985

n=.64moles

Well since we both got the same thing, I think we are right!!!

I hope you are enjoying the class you are taking that requires you to do problems dealing w/ the ideal gas law and you are academically successful. good luck in your endeavors and god bless you!!!

PV = nRT

P= 3 atm

V = 5 L

T = (273 +12) degrees Kelvin

r = 0.0821

3 x 5 / (0.0821 x 285) = 0.64 moles

You get a Gold Star