In a particular experiment, a 5.50 g sample of CaO is reacted with excess water and 6.77 g of Ca(OH)2 is recovered. What is the percent yield in this experiment? Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: Ca(OH)2(s) cao(s) + H2O(l) E)90.64% D) 7953 % C)76.15 % B)93.16 % A)81.24 %