CHEM 1610
General Chemistry I — Practice Question Bank
150+ Problems with Fully Worked Solutions
Independent Study Resource
Not affiliated with or endorsed by Yale University
Based on OpenStax Chemistry 2e (CC BY 4.0)
Edition 2026
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,Table of Contents
1. How to Use This Question Bank
2. Chapter 1: Essential Ideas and Measurement — 10 problems
3. Chapter 2: Atoms, Molecules, and Ions — 12 problems
4. Chapter 3: Composition of Substances and Solutions — 12 problems
5. Chapter 4: Stoichiometry of Chemical Reactions — 12 problems
6. Chapter 5: Thermochemistry — 10 problems
7. Chapter 6: Electronic Structure and Periodic Properties — 12 problems
8. Chapter 7: Chemical Bonding and Molecular Geometry — 12 problems
9. Chapter 8: Advanced Theories of Covalent Bonding — 10 problems
10. Chapter 9: Gases — 12 problems
11. Chapter 10: Liquids and Solids — 10 problems
12. Chapter 11: Solutions and Colloids — 10 problems
13. Chapter 12: Chemical Kinetics — 12 problems
14. Chapter 13: Fundamental Equilibrium Concepts — 12 problems
15. Final Mixed Practice Exam — 25 problems
16. Full Answer Key with Worked Solutions
17. Quick Formula and Constants Reference
Explore our developer-friendly HTML to PDF API Printed using PDFCrowd HTML to PDF
,How to Use This Question Bank
This question bank complements the CHEM 1610 Complete Study Guide. Where the guide teaches the
concepts, this bank trains you to apply them under exam conditions.
Recommended workflow
1. Attempt each problem without looking at the solution. Set a timer: 2–4 minutes per
computational problem, 4–6 minutes for stoichiometry or thermochemistry.
2. Check your units. Chemistry errors are most often unit errors, not concept errors.
3. Re-do missed problems after 48 hours. Spaced repetition is the strongest retention tool.
4. Use the final mixed exam last. It integrates everything under one time limit.
Difficulty Legend
[C] Computational — apply a formula directly.
[A] Applied — translate a real-world scenario.
[X] Conceptual — test understanding.
[★] Challenge — exam-level, multi-step.
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, Chapter 1 — Essential Ideas and Measurement
Problems
1.1 [X] Classify each as element, compound, homogeneous mixture, or heterogeneous mixture: (a) air,
(b) H₂O, (c) granite, (d) gold.
1.2 [C] How many significant figures are in 0.004050?
1.3 [C] Convert 45.0 km/h to m/s.
1.4 [X] Classify each as physical or chemical change: (a) melting ice, (b) rusting iron, (c) dissolving
sugar, (d) burning wood.
1.5 [C] How many significant figures are in 1.2030 g?
1.6 [A] A sample has a mass of 25.4 g and a volume of 10.0 mL. Calculate the density.
1.7 [C] Convert 3.5 kg to grams.
1.8 [C] Convert 25.0 °C to Kelvin.
1.9 [★] A metal has a density of 8.96 g/cm³. If you have 50.0 g, what volume does it occupy?
1.10 [★] Explain why density is an intensive property while mass is extensive.
Worked Solutions
1.1 (a) homogeneous mixture, (b) compound, (c) heterogeneous mixture, (d) element.
1.2 4 significant figures (4, 0, 5, 0).
1.3 45.0 × (1000 m / 3600 s) = 12.5 m/s.
1.4 (a) physical, (b) chemical, (c) physical, (d) chemical.
1.5 5 significant figures.
1.6 Density = 25.4 g / 10.0 mL = 2.54 g/mL.
1.7 3.5 × 1000 = 3500 g.
1.8 25.0 + 273.15 = 298.15 K.
1.9 V = m/d = 50..96 = 5.58 cm³.
Explore our developer-friendly HTML to PDF API Printed using PDFCrowd HTML to PDF
General Chemistry I — Practice Question Bank
150+ Problems with Fully Worked Solutions
Independent Study Resource
Not affiliated with or endorsed by Yale University
Based on OpenStax Chemistry 2e (CC BY 4.0)
Edition 2026
Explore our developer-friendly HTML to PDF API Printed using PDFCrowd HTML to PDF
,Table of Contents
1. How to Use This Question Bank
2. Chapter 1: Essential Ideas and Measurement — 10 problems
3. Chapter 2: Atoms, Molecules, and Ions — 12 problems
4. Chapter 3: Composition of Substances and Solutions — 12 problems
5. Chapter 4: Stoichiometry of Chemical Reactions — 12 problems
6. Chapter 5: Thermochemistry — 10 problems
7. Chapter 6: Electronic Structure and Periodic Properties — 12 problems
8. Chapter 7: Chemical Bonding and Molecular Geometry — 12 problems
9. Chapter 8: Advanced Theories of Covalent Bonding — 10 problems
10. Chapter 9: Gases — 12 problems
11. Chapter 10: Liquids and Solids — 10 problems
12. Chapter 11: Solutions and Colloids — 10 problems
13. Chapter 12: Chemical Kinetics — 12 problems
14. Chapter 13: Fundamental Equilibrium Concepts — 12 problems
15. Final Mixed Practice Exam — 25 problems
16. Full Answer Key with Worked Solutions
17. Quick Formula and Constants Reference
Explore our developer-friendly HTML to PDF API Printed using PDFCrowd HTML to PDF
,How to Use This Question Bank
This question bank complements the CHEM 1610 Complete Study Guide. Where the guide teaches the
concepts, this bank trains you to apply them under exam conditions.
Recommended workflow
1. Attempt each problem without looking at the solution. Set a timer: 2–4 minutes per
computational problem, 4–6 minutes for stoichiometry or thermochemistry.
2. Check your units. Chemistry errors are most often unit errors, not concept errors.
3. Re-do missed problems after 48 hours. Spaced repetition is the strongest retention tool.
4. Use the final mixed exam last. It integrates everything under one time limit.
Difficulty Legend
[C] Computational — apply a formula directly.
[A] Applied — translate a real-world scenario.
[X] Conceptual — test understanding.
[★] Challenge — exam-level, multi-step.
Explore our developer-friendly HTML to PDF API Printed using PDFCrowd HTML to PDF
, Chapter 1 — Essential Ideas and Measurement
Problems
1.1 [X] Classify each as element, compound, homogeneous mixture, or heterogeneous mixture: (a) air,
(b) H₂O, (c) granite, (d) gold.
1.2 [C] How many significant figures are in 0.004050?
1.3 [C] Convert 45.0 km/h to m/s.
1.4 [X] Classify each as physical or chemical change: (a) melting ice, (b) rusting iron, (c) dissolving
sugar, (d) burning wood.
1.5 [C] How many significant figures are in 1.2030 g?
1.6 [A] A sample has a mass of 25.4 g and a volume of 10.0 mL. Calculate the density.
1.7 [C] Convert 3.5 kg to grams.
1.8 [C] Convert 25.0 °C to Kelvin.
1.9 [★] A metal has a density of 8.96 g/cm³. If you have 50.0 g, what volume does it occupy?
1.10 [★] Explain why density is an intensive property while mass is extensive.
Worked Solutions
1.1 (a) homogeneous mixture, (b) compound, (c) heterogeneous mixture, (d) element.
1.2 4 significant figures (4, 0, 5, 0).
1.3 45.0 × (1000 m / 3600 s) = 12.5 m/s.
1.4 (a) physical, (b) chemical, (c) physical, (d) chemical.
1.5 5 significant figures.
1.6 Density = 25.4 g / 10.0 mL = 2.54 g/mL.
1.7 3.5 × 1000 = 3500 g.
1.8 25.0 + 273.15 = 298.15 K.
1.9 V = m/d = 50..96 = 5.58 cm³.
Explore our developer-friendly HTML to PDF API Printed using PDFCrowd HTML to PDF
