3. What is the difference between a substance and a mixture? A. Substance can be separated while mixture cannot be separado B. Substance has many components while mixture has one only C. Substance in heterogeneous while mixture is homogeneous D. Substance is pure while mixture is impure
4. To separate salt from water in a seawater mixture, what process is used A Condensation C. Evaporation B. Distillation 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 C. Heterogeneous B. Homogeneous D. Non-uniform

Can you please help me this problem? ​