Part A: Cu(s)+4HNO3(aq)=2H2O(aq)+2NO2(g)+Cu(NO3)2(aq)

In Part A we added Nitric acid (HNO3) to solid copper (Cu) then heated it up until the copper was completely dissolved. After it was dissolved, there was aqueous cupric nitrate (Cu(NO3)2), H20 and gaseous nitrogen dioxide (NO2)