What is the percent yield if 34.5 g of calcium hydroxide is produced when 37.6 g Calcium oxide reacts What is the percent yield if 34.5 g of calcium hydroxide is produced when 37.6 g Calcium oxide reacts with 100 g of water in this balanced equation? CaO H2O ➜ Ca(OH)2with 100 g of water in this balanced equation? CaO H2O ➜ Ca(OH)2