Name the astrophysicist who first advanced the idea that the chemical elements originated from hydrogen in stars

The astrophysicist who had the first advance idea that the chemical elements origanted are from the hydrogen in the stars is Hubert Reeves. He was a French and Canadian astrophycist in which is also responsible of proposing the idea given in the statement above as he was concluding his studies and researches in regards with hydrogen and helium.

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