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1. Intro to General Chemistry3h 48m
2. Atoms & Elements4h 16m
3. Chemical Reactions4h 10m
4. BONUS: Lab Techniques and Procedures1h 36m
5. BONUS: Mathematical Operations and Functions48m
6. Chemical Quantities & Aqueous Reactions3h 53m
7. Gases3h 49m
8. Thermochemistry2h 37m
9. Quantum Mechanics2h 58m
10. Periodic Properties of the Elements3h 9m
11. Bonding & Molecular Structure3h 29m
12. Molecular Shapes & Valence Bond Theory1h 57m
13. Liquids, Solids & Intermolecular Forces2h 23m
14. Solutions3h 1m
15. Chemical Kinetics2h 53m
16. Chemical Equilibrium2h 29m
17. Acid and Base Equilibrium5h 1m
18. Aqueous Equilibrium4h 47m
19. Chemical Thermodynamics1h 50m
20. Electrochemistry2h 42m
21. Nuclear Chemistry2h 36m
22. Organic Chemistry5h 7m
23. Chemistry of the Nonmetals2h 39m
24. Transition Metals and Coordination Compounds3h 16m

1. Intro to General Chemistry

Density

General Chemistry

1. Intro to General Chemistry

Density

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Multiple Choice

Which of the following is the best estimate for the mass percent of carbon in carbon dioxide (CO2)?

27.3%

33.3%

44.0%

12.0%

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Verified step by step guidance

Identify the chemical formula for carbon dioxide, which is CO₂. This indicates that one molecule of carbon dioxide consists of one carbon atom and two oxygen atoms.

Determine the molar mass of each element in CO₂. The atomic mass of carbon (C) is approximately 12.01 g/mol, and the atomic mass of oxygen (O) is approximately 16.00 g/mol.

Calculate the molar mass of CO₂ by adding the molar mass of one carbon atom and two oxygen atoms: Molar mass of CO₂ = 12.01 g/mol (C) + 2 × 16.00 g/mol (O).

Calculate the mass percent of carbon in CO₂ using the formula: Mass percent of C = (Molar mass of C / Molar mass of CO₂) × 100%.

Substitute the values into the formula to find the mass percent of carbon in CO₂ and compare it with the given options to determine the best estimate.