Question

In a certain chemical reaction Compound A combines with Compound B to produce Compound C (and no other products). Measurements were taken of the amounts of A and B present before and after a reaction that produced some C: Compound initial amount final amount A Og B 7.0 g 5.1 g 7.0 g Calculate the theoretical yield of C. Round your answer to the nearest 0.1 g. 0. Suppose the percent yield of C in this reaction was 89.%. Calculate the actual amount of C that was isolated at the end of the reaction. x 3 ? Round your answer to the nearest 0.1 g.

Answer 1

1)

Mass should be conserved

So,

Initial total mass = final total mass

7.0 g + 7.0 g = 5.1 g + mass(C)

mass(C) = 8.9 g

Answer: 8.9 g

2)

Use:

% yield = actual yield * 100 / theoretical yield

89 = actual yield * 100 / 8.9 g

actual yield = 7.9 g

Answer: 7.9 g