1. Determine the molar mass of potassium sulfide (K₂S):
* Potassium (K) has a molar mass of 39.10 g/mol.
* Sulfur (S) has a molar mass of 32.06 g/mol.
* Since potassium sulfide has two potassium atoms and one sulfur atom, its molar mass is:
(2 * 39.10 g/mol) + (1 * 32.06 g/mol) = 110.26 g/mol
2. Use the formula: mass = moles * molar mass
* mass = 3.3 moles * 110.26 g/mol
* mass = 363.86 g
Therefore, the mass of 3.3 moles of potassium sulfide is approximately 363.86 grams.
