Pv=nrt Question please help lol

[trocha86]

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Ok im trying to figure this out but im having some trouble I tried using V=T(i)/P(i) and V(f)=T(f)/P(f) but IDK how they got the answer D

 

[BigCountry]

use p1v1/t1=p2v2/t2 and solve for v2

 

[KyoPhan]

PV=nRT Isolate the constant R
R=PV/(nT)

R is a constant, so we can form the equation P1V1(n1T1)=P2V2(n2/T2). The # of mols stay the same, so we can simplify it to P1V1/T1=P2V2/T2

After that it's just plugging in.

 

[trocha86]

I did that it just looks sloppy but I understand how it works now... THANK YOU BOTH!!