(a) What is the mass, in grams, of 2.50 × 10-3 mol of ammonium phosphate?
(b) How many moles of chloride ions are in 0.2550 g of aluminum chloride?
(c) What is the mass, in grams, of molecules of 7.70 × 1020 caffeine, C8H10N4O2?
(d) What is the molar mass of cholesterol if 0.00105 mol has a mass of 0.406 g?