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2 cards from this section. Quick, good the night before a test.
What is a pure substance?
Think about how it cannot be separated by physical methods.
Name one example of an element.
Remember, elements are the simplest form of substances.
What defines a pure substance?
Think about what you can and cannot do to a pure substance.
True or False: A compound can be separated into its elements by physical methods.
Remember the difference between physical and chemical changes.
Analyze the following substances: Sodium chloride (NaCl), Oxygen (O₂), and Sand. Classify each as either a pure substance or a mixture and justify your reasoning.
Consider the definitions we've learned!
Why is it important to study pure substances when learning about chemical reactions and their outcomes?
Think about the outcomes during experiments!
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