Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

20. Carbohydrates

Intro to Carbohydrates

GOB Chemistry

20. Carbohydrates

Intro to Carbohydrates

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1:41 minutes

Problem 87

Textbook Question

Carbohydrates provide 4 kcal per gram. If a person eats 200 g per day of digestible carbohydrates, what percentage of a 2000 kcal daily diet would be digestible carbohydrate?

Verified step by step guidance

Determine the total energy provided by the digestible carbohydrates by multiplying the mass of carbohydrates consumed (200 g) by the energy provided per gram of carbohydrate (4 kcal/g). Use the formula:

E = m \times e

, where

E

is the total energy,

m

is the mass of carbohydrates, and

e

is the energy per gram.

Substitute the given values into the formula:

E = 200 \times 4

kcal.

Calculate the percentage of the daily diet that comes from digestible carbohydrates by dividing the energy from carbohydrates by the total daily caloric intake and multiplying by 100. Use the formula:

P = \frac{E}{T} \times 100

, where

P

is the percentage,

E

is the energy from carbohydrates, and

T

is the total daily caloric intake.

Substitute the values into the formula:

P = \frac{800}{2000} \times 100

Simplify the expression to find the percentage of the daily diet that comes from digestible carbohydrates.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Caloric Value of Carbohydrates

Carbohydrates provide 4 kilocalories (kcal) per gram. This means that for every gram of carbohydrates consumed, the body can derive 4 kcal of energy. Understanding this caloric value is essential for calculating the total energy intake from carbohydrates in a diet.

Daily Caloric Intake

Daily caloric intake refers to the total number of calories consumed in a day, which is crucial for maintaining energy balance. In this context, a 2000 kcal daily diet serves as a benchmark to assess the contribution of carbohydrates to overall energy intake, allowing for the calculation of their percentage in the diet.

Percentage Calculation

Percentage calculation involves determining the proportion of a part relative to the whole. In this scenario, it is used to find out what percentage of the total daily caloric intake (2000 kcal) comes from the digestible carbohydrates consumed (800 kcal from 200 g). This concept is fundamental for understanding how different macronutrients contribute to overall dietary energy.

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