The question needs clarification—CH₄ is a chemical formula, not a quantity. To calculate moles, you need mass (grams), volume (liters at STP), or number of molecules.
To Find Moles, Use:
1. From Mass:
- Moles = mass (g) ÷ molar mass (16 g/mol)
- Example: 32 g CH₄ = 32 ÷ 16 = 2 moles
2. From Volume at STP:
- Moles = volume (L) ÷ 22.4 L/mol
- Example: 44.8 L CH₄ = 44.8 ÷ 22.4 = 2 moles
3. From Molecules:
- Moles = molecules ÷ (6.022 × 10²³)
- Example: 1.2044 × 10²⁴ molecules = 2 moles
Importants Points:
- CH₄ alone: Cannot determine moles without quantity
- Need: Mass, volume, or molecule count
- Molar mass CH₄: 16 g/mol