A stock solution of copper (1000 ppm) is available. prepare 50 mL each of five standard solutions, giving the amount of the 1000 ppm solution required for each one and how you would proceed with the preparation, including the kind of pipet needed. The concentrations of the standard solutions should be 1, 2, 3, 4 and 5 ppm

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

it would be b. 6co2 + 6h2o --> c6h12o6 + 6o2