One cup of kidney beans contains 15 g of protein, 1 g of fat, and 42 g of carbohydrate. How many kilocalories, to two significant figures, does this sample contain?

Question

Quizplus · Accepted Answer

Protein provides 4 kilocalories per gram, fat provides 9 kilocalories per gram, and carbohydrates provide 4 kilocalories per gram. Thus, the kidney beans contain:

- Protein: 15 g × 4 kcal/g = 60 kcal
- Fat: 1 g × 9 kcal/g = 9 kcal
- Carbohydrate: 42 g × 4 kcal/g = 168 kcal

Total: 60 kcal + 9 kcal + 168 kcal = 237 kcal

Rounding to two significant figures, the answer is 240 kcal, which is closest to option D.

One Cup of Kidney Beans Contains 15 G of Protein