A sample of gas at 42°C (315 K) has a volume of 5.2 L and exerts a pressure of 608 mm Hg (0.8 atm). How many moles of gas are in the sample? PV= nRT
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Please help!

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml

b.

the accuracy of the data.

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hope it ,

bioteacher101