In our Freeport air, nitrogen has a partial pressure of 80.0kPa, oxygen 16.0kPa, carbon dioxide 0.3 kPa. We also have water vapor. What is the partial pressure of water vapor in our air if we are at STP? A. 2.0 kPa

B. 5.0 kPa

C. 15 kPa

D. 20. kPa

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

the objects have the same charge.