Calculating Theoretical Yield MgO by Christopher Remmich - February 8 2012. Because 28 is 120th of 56 so theoretically you can get 120th of 88g of FeS or 44g. The actual yield is 565 g and the theoretical yield is 572 g.
Again number of moles mass divided by molecular weight.
Yield actual amount obtained x 100 maximum theoretical amount possible. Actual Yield 15. Percentage yield and gas calculations - AQA. Calculating Theoretical Yield MgO by Christopher Remmich - February 8 2012.