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

Balancing Chemical Equations

General Chemistry

3. Chemical Reactions

Balancing Chemical Equations

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Multiple Choice

In balancing the equation for the reaction X CO(g) + Y O2(g) → Z CO2(g), what are the correct values for the coefficients X, Y, and Z?

1, 2, 2

2, 1, 2

2, 2, 1

1, 1, 1

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Verified step by step guidance

Start by writing the unbalanced chemical equation: CO(g) + O2(g) → CO2(g).

Identify the number of atoms of each element on both sides of the equation. Initially, there is 1 carbon (C) atom and 1 oxygen (O) atom in CO, 2 oxygen atoms in O2, and 1 carbon and 2 oxygen atoms in CO2.

To balance the carbon atoms, ensure the number of CO molecules on the reactant side equals the number of CO2 molecules on the product side. This means setting the coefficient of CO to 2, resulting in 2 CO(g) + O2(g) → 2 CO2(g).

Next, balance the oxygen atoms. The reactant side now has 2 oxygen atoms from O2 and 2 oxygen atoms from 2 CO molecules, totaling 4 oxygen atoms. The product side has 4 oxygen atoms from 2 CO2 molecules. This means the coefficient for O2 should be 1.

Verify the balance: The equation 2 CO(g) + 1 O2(g) → 2 CO2(g) has 2 carbon atoms and 4 oxygen atoms on both sides, confirming the equation is balanced with coefficients X = 2, Y = 1, Z = 2.