A solution was prepared by dissolving 200.0 g of KCI in 215 g of water. Calculate the mole fraction of KCL. (The formula weight of KCl is 74.6 g/mol. The formula weight of water is 18.0 g/mol)
Express the mole fraction of KCl to two decimal places.

The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams