3.8x10^-4 g is dissolved into 450g of water . Find the concentration in ppm

0.84ppm

Explanation:

  Mass of solute  = 3.8 x 10⁻⁴g

  Mass of solution  = 450g

Unknown is the concentration in ppm; parts per million

The parts per million is one of the units of representing small concentration of solutes in a solution.

Solutes are the substances dissolving in another to give solution.

Here the concentration is expressed in a million units.

Concentration in ppm  =  x 10⁶

                                     =   x 10⁶

                                     = 0.84ppm

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