Question

If the percent yield of a chemical reaction is 23.5%. Which of the following is the actual yield, in grams, obtained from the reaction, if the theoretical yield was 10.15 grams?

a. 2.39 g b. 23.9 g c. 2.31 g d. Unable to determine

Answer 1

The answer is A

Step-by-step explanation:

The equation for percent yield is...

percent yield =
`(actual)/(theoretical)` × 100%

To find the answer, first plug in what is given to you

You are told

1. the percent yield (23.5%)
2. the theoretical yield (10.15 grams)

This should leave you with an equation that looks like this:

23.5%=
`(actual)/(10.15)` × 100%

Now for the rest of the steps steps:

1. Get rid of the percentages on both sides by moving the decimal place forward. The 23.5% will become 0.235 and the 100% will become 1. Divide both sides by one, to still end up with 0.235 on the left side of the equation.
2. Multiply both sides by 10.15. This will cancel out the 10.15 on the denominator of the right side and leave you with 2.385 of the left side of the equation
3. Round up to be left with your answer of 2.39 g