Air and Water Basics

Air Basics

Composition of Air

• 78% Nitrogen (N2)
• 21% Oxygen (O2)
• 1% Trace gases (Argon, Neon, Helium, etc.)
• Variable amounts of Water Vapor (H2O)

Properties of Air

• Air is a mixture of gases, not a compound
• Air is odorless, tasteless, and colorless
• Air is essential for human life and many industrial processes

Water Basics

Composition of Water

• 2 Hydrogen atoms (H)
• 1 Oxygen atom (O)
• Chemical formula: H2O

Physical Properties of Water

• Boiling point: 100°C (212°F) at standard atmospheric pressure
• Freezing point: 0°C (32°F) at standard atmospheric pressure
• Density: 1 gram per milliliter (g/mL) at 20°C
• High surface tension due to hydrogen bonding

Importance of Water

• Essential for human life and many industrial processes
• Universal solvent, dissolving many substances
• Plays a crucial role in Earth's climate and ecosystems

Air Basics

• Air composition: 78% Nitrogen (N2), 21% Oxygen (O2), 1% Trace gases (Argon, Neon, Helium, etc.), and variable amounts of Water Vapor (H2O)
• Air is a mixture of gases, not a compound
• Air is odorless, tasteless, and colorless
• Essential for human life and many industrial processes

Water Basics

Composition and Formula

• Water composition: 2 Hydrogen atoms (H) and 1 Oxygen atom (O)
• Chemical formula: H2O

Physical Properties

• Boiling point: 100°C (212°F) at standard atmospheric pressure
• Freezing point: 0°C (32°F) at standard atmospheric pressure
• Density: 1 gram per milliliter (g/mL) at 20°C
• High surface tension due to hydrogen bonding

Importance and Roles

• Essential for human life and many industrial processes
• Universal solvent, dissolving many substances
• Plays a crucial role in Earth's climate and ecosystems