Help I’m literally failing I need help

You just simply need to divide the mass by the molar mass to get your moles! :)

1) determine molar mass

= 24.31 + 32.07 + 4(16.00)

= 120.38 g/mol

2) solve

n = 0.292 moles MgSO₄

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