A cheeseburger from a fast food restaurant contains 19 g of fat, 20 g of carbohydrate, and 28 g of protein. How many kcal of energy does the cheeseburger contain? (The accepted caloric values for foods are 4.0 kcal/g for carbohydrate, 9 kcal/g for fat, and 4 kcal/g for protein.) Report the answer to 2 significant figures.

Question

Quizplus · Accepted Answer

First, we need to calculate the total number of calories from each macronutrient:

- Carbohydrate: 20 g x 4.0 kcal/g = 80 kcal
- Fat: 19 g x 9 kcal/g = 171 kcal
- Protein: 28 g x 4.0 kcal/g = 112 kcal

Next, we can add up these values to get the total number of calories in the cheeseburger:

80 kcal + 171 kcal + 112 kcal = 363 kcal

Rounding this to 2 significant figures, we get a final answer of 360 kcal.

A Cheeseburger from a Fast Food Restaurant Contains 19 G