Ohthatskindahardgo Ohthatskindahardgo Chemistry Answered The correct coefficients needed to balance the following reaction are: ___ PbI2 + ___ ZnS → ___ PbS + ___ZnI2 a) 1, 2, 2, 1 b) 1, 1, 1, 1 c) 1, 1, 2, 2 d) 2, 1, 1, 2