1. Find the molar mass of sodium carbonate:
* Na: 22.99 g/mol (x 2 atoms = 45.98 g/mol)
* C: 12.01 g/mol
* O: 16.00 g/mol (x 3 atoms = 48.00 g/mol)
Total molar mass of Na₂CO₃ = 45.98 + 12.01 + 48.00 = 105.99 g/mol
2. Use the formula:
* Moles = Mass / Molar mass
3. Plug in the values:
* Moles = 2.12 g / 105.99 g/mol
* Moles ≈ 0.0200 moles
Therefore, there are approximately 0.0200 moles in 2.12 g of sodium carbonate.
