Answer all1.) wich element(s) is/are not balanced in this equationpb(no3)2 + 2 k i -> pbci2 + kno3kk, n, and on and opb, n, and o2.)wich element(s) is/are not balanced in this equationfe2o3 + 3 co -> fe + 3 co2only the fe is unbalancedonly the o is unbalanced fe and o are both unbalancedc and o are both unbalanced3.)wich of these equations is balanceda.) 3 h2so4 + 2ai -> ai2(so4)3 + 3h2b.) 2kci + pb(no3)2 -> 2kno3 + pbci2aba and bneither4.) how would you balance this equation h2co3 -> co2 + h2oplace a 2 in front of the co2place a 2 in front of the h2co3 and h2oadd an o to the product sideit is already balanced5.) chromium (cr) can combine with chlorine (ci2) to form chromium chloride (crci3). wich equation is a correct representation of this reactioncr+ ci2 -> crci32cr+ ci2 -> crci32cr+ 3ci2 -> crci32cr+ 3ci2 -> 2crci3