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Using the energy values for foods (see Table), 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 2gof protein

(b) the grams of carbohydrate in one apple if the apple has no fat and no protein and provides 72kcalof energy

(c) the kilocalories in one tablespoon of vegetable oil, which contains14gof fat and no carbohydrate or protein

(d )the grams of fat in one avocado that has 405kcal, 13gof carbohydrate, and 5gof protein

Short Answer

Expert verified

Part (a) The orange juice total energy is 476kJ.

Part (b) One apple in carbohydrates is 18g.

Part (c) Teaspoon of vegetable oil energy is 126kcal.

Part (d) One avocado fat is 37g.

Step by step solution

01

(Part a)  Step1: Given information .  

Given data are:26gof carbohydrates, no fat and 2gof protein

To find the one cup of orange juice in kilojoules.

02

(part a)  Step2: orange juice total energy .

The energy values are

Carbohydrate is 17kJ/g

protein is 17kJ/g

26gof carbohydrate is 26g×17kJ/g=442kJ

2gof protein is 2g×17kJ/g=34kJ

The Energy total is 442kJ+34kJ=476kJ

As a result, for one cup of orange juice total energy is476kJ.

03

(Part b) Step3: Given information .  

Given data are: no fat and no protein and72kcalof energy in apple.

To find the grams of carbohydrate in one apple .

04

(Part b)  Step4: Carbohydrate in one apple 

Apple total energy is 72kcal

Totalenergy=energyvalueofcarbohydrate×mass

Proteins and fats are not present.

localid="1653992365596" 72kcal=4kcal/g×mass

localid="1653992373561" mass=72kcal4kcal/g=18g

As a result, carbohydrates in one apple islocalid="1653056310225" 18g.

05

 (Part c) Step5: Given information.

Given data are:14gfat and no carbohydrates and protein.

To find the kilocalories in one tablespoon of vegetable oil .

06

(Part c) Step6: One tablespoon of vegetable oil .

Fat energy value is9kcal/g

14gof fat value is14g×9kcal/g=126kcal

As a result, one teaspoon of vegetable oil is126kcal.

07

(Part d) Step7: Given information .

Given data are:13gcarbohydrates and localid="1653056331035" 5gprotein and localid="1653992411870" 405kcal.

To find the grams of fat in one avocado .

08

(Part d) Step8: Grams of fat in one avocado .

One avocado total energy is 405kcal

Carbohydrate value is 4kcal/g

Protein energy value is 4kcal/g

13gof carbohydrate energy value is 13g×4kcal/g=52kcal

5gof protein energy value is 5g×4kcal/g=20kcal

The total of carbohydrates and protein energy is =(52+20)kcal=72kcal.

Fat energy is 405kcal−72kcal=333kcal

Fat energy value is 9kcal/g

09

(Part d)  Step: 9 Substituting: 

Solving,

Energy of fat=energy value of fat×mass

localid="1653992499514" 333kcal=9kcal/g×mass

localid="1653992509040" mass=333kcal9kcal/g=37g

As a result, one avocado fat islocalid="1653056389000" 37g.

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