Question

According to his prelaboratory theoretical yield calculations, a student's experiment should have produced 1.44 g of magnesium oxide. When he weighed his product after reaction, only 1.23 g of magnesium oxide was present. what is the student's percent yield?

Answer 1

actual compound weight that should be produced/ theoretical weight of compound that should be produced x 100

thus,

1.34g MgO/ 1.44g MgO x 100= _____% yield of MgO

Answer 2

I would use parentheses so that the role of the 100 is clearly understood. Thus,
(1.23/1.44)*100 = ?? percent

Answer 3

85%