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

Writing Ionic Compounds

General Chemistry

3. Chemical Reactions

Writing Ionic Compounds

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Multiple Choice

Provide the molecular formula for the following compound:Sodium dichromate

NaCr₂O₇

Na(Cr₂O₇)₂

NaCrO₄

Na₂Cr₂O₇

Na₂CrO₄

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Verified step by step guidance

Identify the name of the compound: Sodium dichromate.

Recognize that 'dichromate' refers to the dichromate ion, which has the formula \( \text{Cr}_2\text{O}_7^{2-} \).

Understand that sodium (Na) is a monovalent cation with a charge of \( +1 \).

To balance the charges, two sodium ions are needed to balance the \( 2- \) charge of the dichromate ion, resulting in the formula \( \text{Na}_2\text{Cr}_2\text{O}_7 \).

Verify that the molecular formula \( \text{Na}_2\text{Cr}_2\text{O}_7 \) correctly represents sodium dichromate, with two sodium ions and one dichromate ion.