Question

A cheeseburger from a fast food restaurant contains 19 g of fat, 20 g of carbohydrates and 28 g of protein. How many kcal of energy does the cheeseburger contain? (Food caloric values are 9.0 kcal/g for fats, 4.0 kcal/g for carbohydrates and 4.0kcal/g for protein). Round the answer for each type of food to the nearest tens place. A. 70. kcal B. 360 calories C. 17 calories D. 630 calories

Answer 1

Example:

Here, we want to get the kcal of energy contained in the cheeseburger

To do this, we multiply the caloric values of each food type by their masses and then sum

Mathematically, we have that as:

`19(9)\text{ + 20\lparen4\rparen + 28\lparen4\rparen = 363 kcal}`

To the nearest tens, we have that as 360 kcal