Need Help With Chemistry Asap Please, 10 Points.

1.)
Balance the following oxidation-reduction reaction and indicate which atoms have undergone oxidation and reduction.

____Cu + ____HNO3 arrow ____Cu(NO3)2 + _____NO2 + _____H2O




2,)Write the overall, ionic and net ionic equations for the following reaction.
Perchloric acid (HClO4) and barium hydroxide (Ba(OH)2)




3.)Write the overall, ionic and net ionic equations for the following reaction.
Hydrochloric acid (HCl) and potassium hydroxide (KOH)

1. Cu + 4HNO3 --> Cu(NO3)2 + 2NO2 +2H2O

2. 2HClO4 + Ba(OH)2 --> Ba(ClO4)2 + 2 H2O - overall
2H+ + 2ClO4- + Ba2+ + 2OH- --> Ba2+ + 2ClO4- + 2H2O - ionic
H+ + OH- --> H2O - net ionic

3. HCl + KOH --> H2O + KCl - overall
H+ + Cl- + K+ + OH- --> H2O + K+ + Cl- -ionic
H+ + OH- --> H2O - net ionic