Table of contents

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1. Intro to General Chemistry3h 48m
2. Atoms & Elements4h 16m
3. Chemical Reactions4h 10m
4. BONUS: Lab Techniques and Procedures1h 38m
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

Balancing Chemical Equations

General Chemistry

3. Chemical Reactions

Balancing Chemical Equations

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Multiple Choice

Which of the following is the correctly balanced chemical equation for the reaction of lead(II) oxide with ammonia to produce lead, nitrogen gas, and water?

PbO(s) + 2NH3(g) → Pb(s) + N2(g) + 2H2O(l)

3PbO(s) + 2NH3(g) → 3Pb(s) + N2(g) + 3H2O(l)

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Verified step by step guidance

Identify the reactants and products in the chemical equation: Lead(II) oxide (PbO), ammonia (NH3), lead (Pb), nitrogen gas (N2), and water (H2O).

Write the unbalanced chemical equation using the chemical formulas: PbO(s) + NH3(g) → Pb(s) + N2(g) + H2O(l).

Count the number of atoms of each element on both sides of the equation to ensure they are equal. Start with lead (Pb), nitrogen (N), hydrogen (H), and oxygen (O).

Balance the equation by adjusting coefficients. Begin with the element that appears in the fewest compounds, typically starting with metals like lead (Pb).

Verify the balance by recounting the atoms of each element on both sides of the equation. Ensure that the number of atoms for each element is equal on both sides.