Chemists have to be concerned with just how completely their reactants react to form products. Now we will use the actual yield and the theoretical yield to calculate the percent yield. When 240 g of an impure sample of aluminium was reacted with iron oxide 457 g of iron was formed.
To express the efficiency of a reaction you can calculate the percent yield using this formula.
For example if a companys annual dividend is 150 and the stock trades at 25 the dividend yield is 6 150 25. By doing so you will find your gain or loss. If the actual and theoretical yield are the same the percent yield is 100. You determine percent yield of a chemical reaction with the following formula.