Question

In the reaction between CO and Fe3O4, the theoretical yield in an experiment is calculated to be 47.2 gFe. When a careless chemistry student carries out the experiment, the actual yield is 42.9 Fe. Calculatethe percentage yield.
A) 88.5%
B) 70.2%
C) 89.9%
D) 74.3%
E) 90.9%

Answer 1

Answer:

The percentage yield is 90.9 % (option e)

Explanation:

A simple rule of three to explain this.

If the theoretical yield of the reaction is 47.2 g Fe, we assume it as 100%, then what percentage of yield means 42.9 g Fe

47.2 g Fe _____ 100 %

42.9 g Fe ______ ( 42.9  .  100)/ 47.2 = 90.88%