2. Calculate the number of moles in 16.7 g of Al_(2)(SO_(4))_(3) 3. Calculate the mass in grams of 2.50 mol Al_(2)(SO_(4))_(3)

2. To calculate the number of moles in 16.7 g of , we need to use the formula:Moles = Mass / Molar MassFirst, let's calculate the molar mass of :Molar Mass of = (2 * Atomic Mass of Al) + (3 * Atomic Mass of S) + (12 * Atomic Mass of O)Molar Mass of = (2 * 26.98 g/mol) + (3 * 32.07 g/mol) + (12 * 16.00 g/mol)Molar Mass of = 53.96 g/mol + 96.21 g/mol + 192.00 g/molMolar Mass of = 342.17 g/molNow, we can calculate the number of moles:Moles = 16.7 g / 342.17 g/molMoles ≈ 0.0486 molTherefore, there are approximately 0.0486 moles in 16.7 g of .3. To calculate the mass in grams of 2.50 mol , we can use the formula:Mass = Moles * Molar MassWe already calculated the molar mass of in the previous question, which is 342.17 g/mol.Now, we can calculate the mass:Mass = 2.50 mol * 342.17 g/molMass = 855.43 gTherefore, the mass of 2.50 mol is 855.43 g.