PLEASE HELP!!!STOICHIOMETRY for chemistry!!!! =)?

[luvleen_6]

Data table:
Mass of beaker#1: 65.59
Mass of (NH4)2C2O4: 0.62
Mass of Beaker#2: 112.39
Mass of Pb(NO2)2: 1.66
Mass of filter paper:0.92
mass of beaker+precipitate+filterpaper:67.84
Mass of Beaker+Dry Filtrate:113.45
Mass of Precipitate:
mass of dry filtrate:


the questions are:

2: using your mass of (NH4)2C2O4 as a given, calculate:
a:mass of NH4NO3 that should have been produced (theoretical)
b:mass of PbC2O4 that should have been produced (theoretical)

3:calculate the % error for:
a: NH4NO3
b:PbC2O4

4: From the data in the table, calculate:
a: total mass of reactants
b: total mass of products

5: how do your results show conservation of mass.

please only reply if you know


thankyouuu