Balance the equation by inserting coefficients as needed. equation: ZnS + HBr -> ZnBr_{2} + H_{2}S ZnS+HBr⟶ZnBr2+H2S

Answer 1

ZnS + HBr ==> ZnBr₂ + H₂S

Balance the Zn: 1 on each side so it's ok

Balance S: 1 on each side so it's ok

Balance H: 1 on the left side and 2 on the right, so put a 2 in front of the HBr on the left.

ZnS + 2HBr ==> ZnBr₂ + H₂S

By doing this you also made 2 Br on the left, and this now matches the 2 Br on the right. This is the balanced equation.