Multiply by 100 to convert to a percentage. The percent yield of the copper can be expressed as the ratio of the recovered weight to initial weight multiplied by 100. Your calculation of the theoretical yield is correct.
Chemists have to be concerned with just how completely their reactants react to form products.
Weight approximately 0500 g of no. Theoretical mass CuO 001692 mol x 79545 gmol1346. No other quantities needed Step 3. Students will make quantitative measurements of the products calculate percent yield and will complete an independent lab write-up.