Question

A serving of food supplies 15 g carbohydrate, 15 g protein, 400 ml water, 25 mg vitamin c, and 4 g fat. according to this information, how many kilocalories are in a serving of this food?

Answer 1

Answer is: 156 kilocalories are in a serving of this food
15 g carbohydrate has 4 kcal/g · 15 g = 60 kcal.
15 g protein has 4 kcal/g · 15 g = 60 kcal.
4 g fat has 9 kcal/g · 4 g = 36 kcal.
400 ml water has 0 kcal.
25 mg vitamin C has 0 kcal.
total kilocalories = 60 kcal + 60 kcal + 36 kcal + 0 kcal + 0 kcal.
total kilocalories = 156 kcal.

Answer 2

There are 4 kcal in a gram of carbohydrate, 4 kcal in a gram of protein, 9 kcal in a gram of fat, and 0 kcal in a gram of vitamin c and a ml of water. Using that information, there are 60 kcal from carbohydrates, 60 kcal from protein, and 36 kcal from fat, leading to 156 kcal in the serving of food supplies.