R E B O OT C O M PU T E R S E RVI C ES I N C . · C O L L E G E ST U DY S E R I ES
Chemistry 101
The Complete Study Guide to General Chemistry
Concepts · Formulas · Worked Examples · Practice + Solutions
Inside this guide
1 · Matter, Measurement & the SI System
2 · Atomic Structure & the Periodic Table
3 · Chemical Bonding
4 · The Mole & Stoichiometry
5 · Chemical Reactions
6 · Gases, Solutions & Acids/Bases
7 · Master Formula Sheet
8 · Practice Problems with Full Solutions
9 · Glossary of Key Terms
A self-study companion for general chemistry · rebootcs.com
, 1 · Matter, Measurement & the SI System
Chemistry is the study of matter and the changes it undergoes. Matter is anything with mass and volume. It exists as
solid, liquid, or gas, and is classified as pure substances (elements, compounds) or mixtures (homogeneous,
heterogeneous).
Physical vs. Chemical Changes
A physical change alters form but not identity (melting ice). A chemical change produces new substances (burning
wood). Signs of a chemical change: color change, gas, precipitate, heat/light.
Significant Figures
All non-zero digits count; zeros between non-zeros count; leading zeros never count; trailing zeros count only with a
decimal point. In multiplication/division, the answer keeps the fewest sig figs of any factor.
Key constant: Avogadro's number NA = 6.022 × 10²³ particles per mole.
© Reboot Computer Services Inc. · Created by Mario Washington · Page 2 of 11
Chemistry 101
The Complete Study Guide to General Chemistry
Concepts · Formulas · Worked Examples · Practice + Solutions
Inside this guide
1 · Matter, Measurement & the SI System
2 · Atomic Structure & the Periodic Table
3 · Chemical Bonding
4 · The Mole & Stoichiometry
5 · Chemical Reactions
6 · Gases, Solutions & Acids/Bases
7 · Master Formula Sheet
8 · Practice Problems with Full Solutions
9 · Glossary of Key Terms
A self-study companion for general chemistry · rebootcs.com
, 1 · Matter, Measurement & the SI System
Chemistry is the study of matter and the changes it undergoes. Matter is anything with mass and volume. It exists as
solid, liquid, or gas, and is classified as pure substances (elements, compounds) or mixtures (homogeneous,
heterogeneous).
Physical vs. Chemical Changes
A physical change alters form but not identity (melting ice). A chemical change produces new substances (burning
wood). Signs of a chemical change: color change, gas, precipitate, heat/light.
Significant Figures
All non-zero digits count; zeros between non-zeros count; leading zeros never count; trailing zeros count only with a
decimal point. In multiplication/division, the answer keeps the fewest sig figs of any factor.
Key constant: Avogadro's number NA = 6.022 × 10²³ particles per mole.
© Reboot Computer Services Inc. · Created by Mario Washington · Page 2 of 11
