An electron transitioned from the 8th shell to the 1st shell in a helium (He) atom. Rydberg constant for hydrogen (RH) is 2.178 x 10-18 J. The change of energy for the electron is: (a) -1.63 x 10-18 J​
(b) -8.58 x 10-18 J
(c) 2.57 x 10-18 J​
(d) -5.87 x 10-18 J

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

answerspecific gravity;