Water has an unusually lugh boiling point for a molecular compound because it has hydrogen bonding
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ion-ion attractions
a large gram formula mass
a high density​

The solid xy decomposes into gaseous x and y: xy(s) m x(g) + y(g) kp = 4.1 (at 0 °c) if the reaction is carried out in a 22.4 l container, which initial amounts of x and y will result in the formation of solid xy?