Table of contents

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

3. Chemical Reactions

Empirical Formula

General Chemistry

3. Chemical Reactions

Empirical Formula

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Multiple Choice

Which of the following could be both a molecular formula and an empirical formula?

C₂H₄O₂

H₂O₂

O₃

HCN

B₂H₆

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Verified step by step guidance

Understand the difference between molecular and empirical formulas. A molecular formula shows the actual number of atoms of each element in a molecule, while an empirical formula shows the simplest whole-number ratio of these atoms.

Examine each given formula to determine if it can be both a molecular and empirical formula. A formula can be both if it is already in its simplest form, meaning the ratio of atoms cannot be reduced further.

Consider the formula C2H4O2. The ratio of atoms can be simplified to CH2O, so it is not both a molecular and empirical formula.

Consider the formula H2O2. The ratio of atoms can be simplified to HO, so it is not both a molecular and empirical formula.

Consider the formula O3. This formula is already in its simplest form, as the ratio of atoms cannot be reduced further, making it both a molecular and empirical formula.