Chapter 3.5, Problem 3.31PP

Using the energy values for foods (see TABLE3.7), determine each of the following (round off the answer for each food type to the tens place):

a. the total kilojoules for one Cup Of orange juice that contains 26 g of carbohydrate, no fat, and 2 g ofprotein
b. the grams of carbohydrate in one apple if the apple has no fat and no protein and provides 72 kcal of energy
c. the kilocalories in one tablespoon of vegetable oil, which contains 14 g of fat and no carbohydrate or protein
d. the grams of fat in one avocado that has 405 kcal, 13 g of carbohydrate, and 5 g of protein

TABLE 3.7 Typical Energy Values for the Three Food Types

Food Type	kcal/g	kJ/g
Carbohydrate	4	17
Fat	9	38
Protein	4	17

$\text{kilocalories}=\cancel{\text{g}}\times \frac{\text{kcal}}{\cancel{\text{g}}}$   $\text{kilojoules}=\cancel{\text{g}}\times \frac{\text{kJ}}{\cancel{\text{g}}}$