Lead nitrate can be decomposed by heating. What is the percent yield of the decomposition reaction if 9.9 g of #Pb(NO_3)_2#are heated to give 5.5 g of #PbO#??
We need (i) a stoichiometric equation........
This simply must be known; nitrates undergo thermal decomposition to give oxide and nitric oxide and dioxygen gas.
And (ii). given the 1:1 stoichiometry between nitrate and oxide, we needs equivalent quantities of lead oxide and lead nitrate: