/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q. 3.31 Using the energy values for food... [FREE SOLUTION] | 91Ó°ÊÓ

91Ó°ÊÓ

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.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91Ó°ÊÓ!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

If the same amount of heat is supplied to samples of10.0geach of aluminum, iron, and copper all at15.0°C. which sample would reach the highest temperature (see Table 3.11)?

a. During one week, Charles swam for a total of 2.5h and walked for a total of 8h. If Charles expends 340kcal/h swimming and 160kcal/h walking, how many total kilocalories did he expend for one week?

b. For the amount of exercise that Charles did for one week in part a, if expending 3500 kcal is equal to a loss of 1.0 lb, how many pounds did he lose?

c. How many hours would Charles have to walk to lose 1.0 lb?

d. How many hours would Charles have to swim to lose 1.0 lb?

When a 0.66gsample of olive oil is burned in a calorimeter, the heat released increases the temperature of 370gof water from 22.7∘Cto 38.8∘C. What is the energy value for the olive oil in sample?

Identify each of the following as a physical or chemical property: (3.2)

a.Acandle is 10 in. high and 2 in. in diameter.

b. A candle burns.

c. The wax of a candle softens on a hot day.

d. A candle is blue.

Gold, one of the most sought-after metals in the world, has a density of 19.3g/cm3, a melting point of 1064∘C, and specific heat of 0.129J/g∘C. A gold nugget found in Alaska in 1998 weighed 20.17 lb.

a. How many significant figures are in the measurement of the weight of the nugget?

b. Which is the mass of the nugget in kilograms?

c. If the nugget were pure gold, what would its volume be in cubic centimetres?

d. What is the melting point of gold in degrees Fahrenheit and kelvins?

e. How many kilocalories are required to raise the temperature of the nugget from 500∘Cto1064∘C ?

f. If the price of gold is $42.06 per gram, what is the nugget worth in dollars.

See all solutions

Recommended explanations on Chemistry Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.