Question

Review | Constants | Periodic Table The label on a can of ”Healthy Request” chicken noodle soup indicates that each 1-cup portion supplies 149 kcal and has 11 g of protein, 15 g of carbohydrate, and 5 g of fat.

Calculate the percentage of calories that come from protein.

Calculate the percentage of calories that come from carbohydrate.

Calculate the percentage of calories that come from fat.

Express your answer to three significant figures.

Answer 1

First find the energy given by each nutrient.

Then, find percentage.

Total amount of energy supplied by 1- cup portion is - 149 kcal

Mass of protein is - 11 g

Mass of carbohydrate is - 15 g

Mass of fat is - 5 g

Total mass of nutrients = 11 g +15 g+ 5 g = 31 g

calories that come from protein = (mass of protein/total mass of nutrients) x total calories

Substitute the given values in above equation:

calories that come from protein = (11 g/ 31 g) x 149 kcal

  = 52.9 kcal

percentage of calories that come from protein :

Out of 149 kcal - 52.9kcal energy is given by proteins.

Out of 100 kcal how much is given by proteins?

=(52.9 kcal x 100 ) / 149kcal

= 35.5%

calories that come from carbohydrate = (mass of carbohydrate/total mass of nutrients) x total calories

Substitute the given values in above equation:

calories that come from protein = (15 g/ 31 g) x 149 kcal

  = 72.1 kcal

percentage of calories that come from carbohydrates :

Out of 149 kcal - 72.1kcal energy is given by carbohydrates.

Out of 100 kcal how much is given by carbohydrates?

=(72.1 kcal x 100 )/149 kcal

= 48.4%

calories that come from fat = (mass of fat/total mass of nutrients) x total calories

Substitute the given values in above equation:

calories that come from protein = (5 g/ 31 g) x 149 kcal

  = 24.03 kcal

percentage of calories that come from fat :

Out of 149 kcal - 24kcal energy is given by fat.

Out of 100 kcal how much is given by fat?

(24.03 kcal x 100 ) / 149kcal

= 16.1%