Chapter 1, Problem 1.3E

If matter is uniform throughout and cannot be separated into other substances by physical processes, but can be decomposed into other substances by chemical processes, it is called a(n): A) heterogeneous mixture B)compound C) homogeneous mixture E) mixture of elements D) element

Disung dishing chemical and physical change There ar sketches below. The first sketch shows a sample of Substance X. The three sketches underneath it show three different changes to the sample. You must decide whether each of these changes is possible. If a change is possible, you must also decide whether it is a physical change or a chemical change. Each sketch is drawn as if the sample were under a microscope so powerful that individual atoms could be seen. Also, you should assume that you can see the entire sample, and that the sample is in a sealed box, so that no matter can enter or leave. Sample of Substance X Change 1 Change 1 is: impossible O a physical change O a chemical change Change 2 Change 2 is: O impossible O a physical change. O a chemical change. Change 3 Change 3 is: O impossible O a physical change O a chemical change

Suppose a teaspoon of magnesium filling and a teaspoon of powdered sulfur are placed together in a metal beaker. Would this constitute a mixture or a pure substance ?