Log in
Chemistry
1
answer
0
watching
88
views
13 Dec 2019

Alexander, who weighs 174lb , decides to climb Mt. Krumpett, which is 5810m high. For his food supply, he decides to take nutrition bars. The label on the bars states that each 100-g bar contains 10g of fat, 40 g of protein, and 50 g of carbohydrates.

One gram of fat contains 9 Calories, whereas each gram of protein and carbohydrates contains 4 Calories.

Alexander wants to know exactly how many bars to pack in his backpack for the journey. To provide a margin of safety, he assumes that he will need as much energy for the return trip as for the uphill climb. How many bars should Alexander pack?

I calculated 4.4 bars but it said i was wrong>>>> thanks for the help

Nutrition facts Calories per gram
Fat 9
Protein 4
Carbohydrates 4

Watch
1
answer
0
watching
88
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Patrina Schowalter
Patrina SchowalterLv2
17 Dec 2019

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share
discord banner image
Join us on Discord
Chemistry Study Group
Join now

Related textbook solutions

Basic Chemistry
5 Edition,
Timberlake
ISBN: 9780134138046
Principles of Chemistry Molecular Approach
4th Edition,
Tro
ISBN: 9780134112831
Chemistry: Structure and Properties
2nd Edition,
Tro
ISBN: 9780134293936
Principles of Chemistry Molecular Approach
3rd Edition, 2014
Tro
ISBN: 9780321971944
Chemistry: A Molecular Approach
3rd Edition,
Tro
ISBN: 9780321809247
Chemistry: A Molecular Approach
5th Edition,
Tro
ISBN: 9780134874371
Principles of Chemistry: A Molecular Approach
4th Edition,
Tro
ISBN: 9780134895741
Chemistry: The Central Science
14th Edition, 2017
Brown
ISBN: 9780134414232

Related questions

Part A - Equations Associated with Enthalpies of Formation

If the heat of formation of H2O(l) is -286 kJ/mol, which of the following thermochemical equations for the formation of H2O is correct?

If the heat of formation of is -286 , which of the following thermochemical equations for the formation of is correct?

2 H(g) + O(g) → H2O(l) ΔH=−286 kJ
H2(g) + O(g) → H2O(g) ΔH=−286 kJ
2 H2(g) + O2(g) → 2 H2O(l) ΔH=−286 kJ
H2(g) + 12 O2(g) → H2O(l) ΔH=−286 kJ

H2O(l) → H2(g) + 12 O2(g) ΔH=286 kJ

NUMBER 2

Alexander, who weighs 195 lb , decides to climb Mt. Krumpett, which is 5300 m high. For his food supply, he decides to take nutrition bars. The label on the bars states that each 100-g bar contains 10 g of fat, 40 g of protein, and 50 g of carbohydrates.

One gram of fat contains 9 Calories, whereas each gram of protein and carbohydrates contains 4 Calories.

Nutrition facts Calories per gram
Fat 9
Protein 4
Carbohydrates 4

Alexander wants to know exactly how many bars to pack in his backpack for the journey. To provide a margin of safety, he assumes that he will need as much energy for the return trip as for the uphill climb. How many bars should Alexander pack?

Enter the exact answer to two significant figures. Do not round to an integer.

#1. The label of a lemon poppyseed bar lists the nutrition facts as5.0 g of fat, 25 g of carbohydrates and 9.0 g of protein.

Info: Caloric Values of Carb (4 kcal/g), fat (9 kcal/g) and protein(4kcal/g)...
total kilocalories= 180 kcal
Info #2: Energy Value of Lemon Bar in kJ:
760 kJ

Questions:
If you obtain 165 kJ, how many grams of the lemon poppyseed bar didyou eat?

If you are walking 840 kJ/h, how many minutes will you need to burnoff teh calories of two lemon bars?

In a box of nails, there are 75 iron nails weighing .280 lb. Thedensity of iron is 7,.86 g/cm^3. The specific heat of iron is .452J/g Cel.

Questions: If 30 nails are added to a graduated cylinder containing23.3 mL of water, what is the new level of water in tehcylinder?
How many joules must be added to the nails in the box to raise thetemperature from 12 to 129 Deg Celsius?
If al the iron nails at 55.0 C are added to the 321 g of water at4.0 C, what will be the final temperature C of the nails and water?

The label of a black cherry almond energy bar with a mass of 68 g lists the nutrition facts as 39 g of carbohydrate, 5 g of fat, and 10. g of protein. (2.5, 2.6, 3.4, 3.5)

Using the energy values for carbohydrates, fats, and proteins (see table below), what are the total kilocalories (Calories) listed for a black cherry almond bar? (Round off answers for each food type to the tens place.)

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

Express your answer with the appropriate units.

B: What are the kilojoules for the black cherry almond bar? (Round off answers for each food type to the tens place.)

C: If you obtain 160 kJ

, how many grams of the black cherry almond bar did you eat?

Express your answer to two significant figures and include the appropriate units.

D:I f you are walking and using energy at a rate of 840

kJ/h , how many minutes will you need to walk to expend the energy from two black cherry almond bars?

Express your answer to two significant figures and include the appropriate units.

Weekly leaderboard

Home
Homework Help 3,900,000
Chemistry 830,000
Start filling in the gaps now
Log in