Ch.1 - Introduction: Matter, Energy, and Measurement
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Problem 1a
Which of the following figures represents (a) a pure element, (More than one picture might fit each description.)
Problem 2
Which of the following diagrams represents a chemical change?
Problem 1b
Which of the following figures represents (b) a mixture of two elements, (More than one picture might fit each description.)
Problem 1c
Which of the following figures represents (c) a pure compound, (More than one picture might fit each description.)