1 – Chemistry: The Study of Change
2 – Atoms, Molecules, and Ions
3 – Mass Relationships in Chemical Reactions
4 – Reactions in Aqueous Solutions
5 – Gases
6 – Thermochemistry
1 – Chemistry: The Study of Change
p 2 , H2-filled balloon , exploding with heated with flame
H2 gas react O2 in air -> form water vapor
p 3,