Asample of a hydrate has a mass of 5.026 g. after it is heated, it has a mass of 3.492 g. what is the percentage by mass of water in the hydrate?
1. 19.40%
2. 27.92%
3. 30.52%
4. 69.48%

In the particles are arranged in a regular, repeating pattern. a)a crystalline liquid b)a crystalline solid c)all gases d)all solids

Which of the following substances is the most soluble in water? a. sodium chloride b. methane c. bromine d. carbon

Which statement best describes the liquid state of matter? a. it has definite shape but indefinite volume. b. it has definite shape and definite volume. c. it has indefinite shape and indefinite volume. d. it has indefinite shape but definite volume.