CHE 17 Name
2. Explain how pure substances differ from mixtures, using chemical examples.
3. The speed of light is 3.0 x 108 m/s. How fast is this speed in miles per hour? Show your work for full credit! (1 km = 0.621 miles)
4. Describe one of the postulates of Daltonís atomic theory, explaining how this postulate explains a scientific law.