Chem- Percent Yield
posted by Lara on .
When HgO is heated, it decomposes into elemental mercury and diatomic oxygen gas. If 42.9 g of Hg is obtained from 70.1 g of the mercuric oxide, what is the percent yield of the reaction?
2HgO ==> 2Hg + O2
mol HgO = 70.1g/molar mass HgO = ?
Use the coefficients to convert mols HgO to mols Hg. The ratio is 2:2 which is 1:1; therefore, mols HgO = mols Hg.
Convert mols Hg to grams. g = mols x atomic mass. This is the theoretical yield (TY). The actual yeld (AY) = 42.9.
%yield = (AY/TY)*100 = ?