One cup of kidney beans contains 15 g of protein, 1.0 g of fat, and 42 g of carbohydrate. How many kilocalories, to two significant figures, does this sample contain?

Question

Quizplus · Accepted Answer

First, we need to calculate the number of kilocalories (kcal) from each macronutrient per gram:

- Protein: 4 kcal/g
- Fat: 9 kcal/g
- Carbohydrate: 4 kcal/g

Using these conversion factors, we can calculate the number of kilocalories in one cup of kidney beans:

- Protein: 15 g x 4 kcal/g = 60 kcal
- Fat: 1.0 g x 9 kcal/g = 9 kcal
- Carbohydrate: 42 g x 4 kcal/g = 168 kcal

Adding these values together, we get:

60 kcal + 9 kcal + 168 kcal = 237 kcal

Rounding to two significant figures, the answer is:

Answer: D
 One cup of kidney beans contains approximately 240 kcal.

One Cup of Kidney Beans Contains 15 G of Protein