1. Find the molar mass of SO₃:
* Sulfur (S) has a molar mass of 32.06 g/mol.
* Oxygen (O) has a molar mass of 16.00 g/mol.
* SO₃ has one sulfur atom and three oxygen atoms, so its molar mass is: 32.06 g/mol + (3 * 16.00 g/mol) = 80.06 g/mol
2. Use the formula: mass = moles * molar mass
* mass = 6.11 moles * 80.06 g/mol
* mass ≈ 488.9 g
Therefore, 6.11 moles of sulfur trioxide have a mass of approximately 488.9 grams.
