Sodium oxide reacts with water to produce sodium hydroxide. Suppose 11.1 g of sodium oxide is combined with 38.7 g of water. When the reaction is complete, all the sodium oxide has been consumed. According to the law of conservation of mass, which is a true statement? The mass of sodium hydroxide produced must equal 49.8 g. The mass of unreacted water must equal 27.6 g. The mass of sodium hydroxide produced must equal 11.1 g. The mass of water consumed must equal 11.1 g. The mass of sodium hydroxide produced plus the mass of unreacted water must equal 49.8 g. Question 19 Which of the following represents a pair of isotopes? Atomic Number Mass Number ΟΙ 17 34 II 18 34 01 7 14 II 8 14 ΟΙ 17 35 II 17 37 ΟΙ 17 37 II = 18 38 ΟΙ II 7 7 x 8 15 16 20 1 pts 1 pts