# Question #39bd1

Dec 5, 2016

50.6%

#### Explanation:

Start with a balanced chemical reaction, always. You need the molar ratios to determine percent yield.

${C}_{7} {H}_{6} {O}_{3} + {C}_{4} {H}_{6} {O}_{3} \to {C}_{9} {H}_{8} {O}_{4} + {C}_{2} {H}_{4} {O}_{2}$

In this case you could remember that they are 1:1, but I'm going to suggest you always find the balanced reaction, because in many cases the molar ratio will not be 1:1.

Remember to find the molar ratios and that the formula for percent yield is the actual/theoretical yield multiplied by 100.

Consider the graphic bleow: