Urgent ! i dont understand it.

56. one of the steps in the production of nitric acid involves the reaction of ammonia and oxygen to form nitrous oxide:

2nh₂ ₍g₎ + 2.5o₂ ₍g₎ ⇄ 2nh ₍g₎ + 3h₂o ₍g₎ + heat

describe and explain four ways in which an industrial chemist could increase the yield of nitrous oxide. (4 marks)

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

there is none because earth is stationary and flat.