Show how mass is conservered in the following

Question

Show how mass is conserved in the following equation. Show math. 3 Ag2SO4(aq) + 2 Ni(s) ---> Ni2(SO4)3(aq) + 6 Ag(s)

Answer 1

Count the number of each element on the left and right hand sides of the balanced chemical equation and see that the left and right sides have the same number:

 

Ag: 3x2 = 6 on the left, 6X1 = 6 on the right

S: 3x1 = 3 on the left, 3x1 = 3 on the right

O: 3x4 = 12 on the left, 3x4 = 12 on the right

Ni: 2x1 = 2 on the left, 2x1 = 2 on the right

 

On both sides of the equation, multiply the number of each element present by its atomic weight and add together the results of all the elements.  The totals will be the same on both sides.