4. To separate salt from water in a seawater mixture, what process is used? A. Condensation B. Distillation C. Evaporation D. Filtration 5. Which of the following is a property of mixture? A. It has a definite composition. B. It consists of a single phase. C. It has a heterogeneous composition. D. It can be chemically separated into its components. 6. Which of the following is a physical appearance of a substance? A. Complicated B. Homogeneous C. Heterogeneous D. Non-uniform 7. Which one is the best way to determine whether an unknown sample is a substance or a mixture? A. Knowing its density B. Tasting the given sample C. Observing its physical appearance 1 boiling point​