Question

Your favorite recipe for preparing 100 brownies requires the following: 6 eggs, 5 cups flour, and 2 sticks of butter. How many eggs would be required to yield 50 brownies?
Question options:

1 egg


2 eggs


3 eggs


4 eggs

Answer 1

Correct answer: C) 3 eggs

The given recipe for preparing 100 brownies,

6 eggs + 5 cups flour + 2 sticks butter ----> 100 brownies

Assuming the number of each starting material/ product as the moles of each reactant/product. The mole ratios of the different reactants and product is:

$\frac{6 eggs}{100 brownies}$;$\frac{5 cups fluor}{100 brownies}$;$\frac{2 sticks butter}{100 brownies}$

We would need the mole ratio of eggs/brownies in order to find out the number of eggs required to prepare 50 brownies.

$50 brownies * \frac{6 eggs}{100 brownies} = 3 eggs$

Answer 2

The answer is c because the ratio of 100 to 50 is 2:1, and so since there is 6 eggs required to make 100 brownies, you divide 6 by two and you get 3.