Table of contents

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

Stoichiometry

General Chemistry

3. Chemical Reactions

Stoichiometry

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Multiple Choice

Which of the following is the balanced chemical equation for the formation of calcium nitrate, Ca(NO3)2(s), from its respective elements in their standard states?

Ca(s) + 2N2(g) + 6O2(g) → 2Ca(NO3)2(s)

Ca(s) + 2NO2(g) → Ca(NO3)2(s)

Ca(s) + N2(g) + 3O2(g) → Ca(NO3)2(s)

Ca(s) + N2(g) + O2(g) → Ca(NO3)2(s)

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Verified step by step guidance

Identify the elements involved in the formation of calcium nitrate: calcium (Ca), nitrogen (N), and oxygen (O).

Determine the standard states of these elements: calcium is a solid (Ca(s)), nitrogen is a diatomic gas (N2(g)), and oxygen is a diatomic gas (O2(g)).

Write the unbalanced chemical equation using these elements in their standard states to form calcium nitrate, Ca(NO3)2(s).

Balance the equation by ensuring the number of atoms of each element is the same on both sides of the equation. Start by balancing the calcium atoms, then nitrogen, and finally oxygen.

Verify the balanced equation: Ca(s) + N2(g) + 3O2(g) → Ca(NO3)2(s), ensuring that it reflects the correct stoichiometry for the formation of calcium nitrate from its elements in their standard states.