The percentage yield : 79.67%
The closest answer is option B.
Further explanation
Given
125.4 g C3H8
157.4 g C3H8
Required
The percentage yield
Solution
Percent yield is the comparison of the amount of product obtained from a reaction with the amount you calculated
General formula:
% yield = (actual yield : theoretical yield) x 100%
Input the value :
% yield = (125.4 : 157.4) x 100%
% yield = 79.67
