Which of the following showing the Law of Conservation of Mass?
*Select all that apply* *

Same number of atoms
Different number of atoms
Same number of grams/mass
Different number of grams/mass
Same number of elements
Different number of elements
Mass is always conserved during a chemical reaction
Mass can vary during a chemical reaction

I'm pretty sure mass is always conserved during a chemical reaction.

Explanation:

Sorry for not answering the whole question.

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