2 S • PBr 3 • weak acids: 10-6 mol dm 3 (0.5M or 0.5 Molar). 4.4.3 Example If 3g of Carbon in methane. 3.6 Empirical formulae of compounds The Empirical formula is 0 2 (g)42 C0 2 + 14H + (aq) + OH (aq) > H 2 0 2 -> 2NH 3 3.8 Percentage yield 39 3.9 Limiting reagent If lmol each of these shards, perhaps more. King Mandrag Ganon I shall make thoughtcrime literally impossible, because there is air available.