Pb(NO3)2 + _K2Cr04 -_PbCro4 +_KNO; Balance the reaction and number the coefficients left to right Select one: O a. 1,1,1,1 O b. 3,1,1,1 O c. 1.1,1,2 O d. 2,1,1,1 NaOH(ag) + _H254(aq) Na,SO4(ag) + _H2() Balance the reaction and number the coefficients from left to right. Select one: O a. 1,1,1,1 O b. 2.2,2,1 O c. 2,1,1,2 O d. 1,2,1,2