How Many Moles is 32 g of O₂?
32 grams of molecular oxygen (molar mass 32.00 g/mol) is exactly 1 mole.
How to use this tool
- Enter mass and molar mass in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your amount and the full breakdown beneath it.
Convert 32 g of oxygen gas to moles — one of the most common chemistry conversions.
Frequently asked questions
- What molar mass should I use?
- Look up the molecular formula and sum the atomic masses. Common examples: H₂O = 18.015, CO₂ = 44.009, NaCl = 58.44, glucose C₆H₁₂O₆ = 180.16 g/mol.
- What is a millimole?
- 1 mmol = 0.001 mol. Millimoles are common in biochemistry and medicine where concentrations are small.