What Does 0.5 Moles of CH₄ Contain?

0.5 moles of CH₄ contains 3.011 × 10²³ molecules, has a mass of 8 grams, and occupies 11.2 liters at STP.

Calculations:

Molecules:

• 0.5 × 6.022 × 10²³ = 3.011 × 10²³ molecules

Mass:

• Molar mass CH₄ = 16 g/mol
• 0.5 × 16 = 8 grams

Volume at STP:

• 0.5 × 22.4 L = 11.2 liters

Total Atoms:

• Each CH₄ has 5 atoms
• 5 × 3.011 × 10²³ = 1.506 × 10²⁴ atoms

Importants Points:

• Molecules: 3.011 × 10²³
• Mass: 8 grams
• Volume at STP: 11.2 L