what is the balanced equation of lead nitrate on b and oxygeneing heated from lead oxide, nitrogen dioxide

Your question is not clear. Any way I think you are asking for the decomposition reaction of lead nitrate.

When heated, lead(II) nitrate crystals decompose to lead(II) oxide, dioxygen and nitrogen dioxide, accompanied by a crackling noise. This effect is referred to as decrepitation.

2 Pb(NO3)2 (s) → 2 PbO (s) + 4 NO2 (g) + O2 (g)