I'm:confused: answer the following::D [LIST=1]
AgCl+Na2SO4 NaCl+Ag2SO4
Fe2O3+HCl FeCl3+H2O
KCl+Mg(NO3)2 KNO3+MgCl2

I'm thinking you posted this in the wrong section.

It may help you to think of the polyatomic ions as a single group, so that in the last equation, you think of each NO3 as one unit instead of one nitrogen, three oxygens.

Why don't you try them and post your answers... right now it seems like you're asking people to just do the problem for you.