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Chemistry- density questions

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I have been stuck on this question for about an hour, please help. 

Suppose a gas sample has a density of 
3.68 g/L at STP. What is its density at 25 oC 

and 19.0 atm?

Dec 9th, 2014

First we have to find its new volume using 

P1V1/T1 =P2 V2/T2

Hence V1/V2 = P2T1 /(P1T2)   (temp in degrees K)

                      = 19 x 273.15/ 1 x 298.15

                     =17.4068

now mass has not changed and mass =volume x density

Hence V1 d1= V2 d2

d2 = V1d1/V2 = V1/V2 x d1

                      = 17.4068 x 3.68

                      =64.79 g/l


                     

Dec 10th, 2014

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Dec 9th, 2014
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