What are compounds? 1)Pure substance

2)homogeneous mixtures

3) heterogeneous mixtures

How does a scientist the government? a. the scientist tells people in society what to do. b. the scientist determines the policies that the government spends money on. c. the scientist provides unbiased information to the government. d. the scientist makes laws based on his or her research results.

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

How can a give a full method for the experiment of separating sand from water by filtration? 1-materials 2-steps 3-conclusion also for water and salt separated by the evaporation or distillation process