Chapter 3.5, Problem 3.30QAP

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 in two tablespoons of crunchy peanut butter that contains 6 g of carbohydrate, 16 g of fat, and 7 g of protein
b. the grams of protein in one cup of soup that has 110 kcal with 9 g of carbohydrate and 6 g of fat
c. the kilocalories in one can of cola if it has 40. g of carbohydrate and no fat or protein
d. the total kilocalories for a diet that consists of 68 g of carbohydrate, 9 g of fat, and 150 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

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