text: which of the following statements are true? for statements   a)   through   d)   use the reaction:    cu(s)   +   2ag+(aq)   -->   2ag(s)   +   cu2+(aq)     a)   cu   is the oxidizing agent  b)   ag+   is the oxidizing agent  c)   cu   is oxidized  d)   ag+   is oxidized  e)   hcl(g)   +   nh3(g)   -->   nh4cl(s)       is a redox reaction  f)   o3(g)(aq)   +   no(g)   -->   o2(g)   +   no2(g)       is a redox reaction your formula itself is incorrect...you must have copied it wrong.