Questions: The nutrition facts label for crackers states that 1 serving contains 19 g of carbohydrates, 4 g of fat, and 2 g of protein. What is the total kilocalories for one serving of crackers? Hint: You already calculate the energy in kilocalories for each food type in the previous problem. 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 A. 13 kcal B. 1130 kcal C. 230 kcal D. 130 kcal

The nutrition facts label for crackers states that 1 serving contains 19 g of carbohydrates, 4 g of fat, and 2 g of protein. What is the total kilocalories for one serving of crackers? Hint: You already calculate the energy in kilocalories for each food type in the previous problem.

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

A. 13 kcal
B. 1130 kcal
C. 230 kcal
D. 130 kcal

Transcript text: The nutrition facts label for crackers states that 1 serving contains 19 g of carbohydrates, 4 g of fat, and 2 g of protein. What is the total kilocalories for one serving of crackers? Hint: You already calculate the energy in kilocalories for each food type in the previous problem. TABLE 3.7 Typical Energy Values for the Three Food Types \begin{tabular}{lcc} \hline Food Type & $\mathrm{kcal} / \mathrm{g}$ & $\mathrm{kJ} / \mathrm{g}$ \\ \hline Carbohydrate & 4 & 17 \\ Fat & 9 & 38 \\ Protein & 4 & 17 \\ \hline \end{tabular} A. 13 kcal B. 1130 kcal C. 230 kcal D. 130 kcal

Solution

Solution Steps

Step 1: Identify the Energy Values for Each Food Type

From the provided table, we know the energy values for each food type:

Carbohydrate: 4 kcal/g
Fat: 9 kcal/g
Protein: 4 kcal/g

Step 2: Calculate the Energy Contribution from Carbohydrates

Given that 1 serving contains 19 g of carbohydrates: \[ \text{Energy from carbohydrates} = 19 \, \text{g} \times 4 \, \text{kcal/g} = 76 \, \text{kcal} \]

Step 3: Calculate the Energy Contribution from Fat

Given that 1 serving contains 4 g of fat: \[ \text{Energy from fat} = 4 \, \text{g} \times 9 \, \text{kcal/g} = 36 \, \text{kcal} \]

Step 4: Calculate the Energy Contribution from Protein

Given that 1 serving contains 2 g of protein: \[ \text{Energy from protein} = 2 \, \text{g} \times 4 \, \text{kcal/g} = 8 \, \text{kcal} \]

Step 5: Sum the Total Energy

Add the energy contributions from carbohydrates, fat, and protein: \[ \text{Total energy} = 76 \, \text{kcal} + 36 \, \text{kcal} + 8 \, \text{kcal} = 120 \, \text{kcal} \]