Complete and balance the equation for the combustion of zns in excess oxygen ? zns + ? o2→ ? zno + ? use no fractional coefficients. the number of moles and the formula of the product containing s are

The combstion of ZnS in excess oxygen gives ZnO and SO₂ as the products.
hence the equation should be;

                   ZnS(s) + O₂(g) →ZnO(s) + SO₂(g)

At the left hand side:                               At the right hand side:
number of Zn atoms = 1                               number of Zn atoms = 1
number of S atoms = 1                                 number of S atoms = 1
number of O atoms = 2                                number of O atoms = 3

Hence the balanced equation is;
           2ZnS(s) + 3O₂(g) →2ZnO(s) + 2SO₂(g)

You use the atomic number to find out how many protons and neutrons there are in the atom. you use the atomic mass to find out how many protons and electrons there are in the atom. 

The correct answer is b) false