Ch 1 more Measurement

Ch 1 more Measurement - Chem 101 Nielson More practice...

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Nielson More practice problems for Ch 1 Measurement 1. Classify the following processes as either chemical or physical properties of magnesium, Mg. a. 15 mg of magnesium dissolves in excess hydrochloric acid with the production of 7.8 ml of hydrogen gas. b. Magnesium melts at 649 o C. c. Magnesium is shiny and conducts electricity. d. When heated in oxygen, magnesium changes from a shiny metal to a white solid that no longer conducts electricity. 2. Identify the following as pure substances or mixtures. a. H 2 b. Sucrose, C 12 H 22 O 11 c. Silver dental filling d. smoke e. iron oxide or rust 3. The scientific method includes observations, laws, hypothesis, theories. a. What is the difference between a hypothesis and a theory? b. What is the difference between a theory and a scientific law? 4. Common SI units and prefixes are part of our chemistry language; learn them! a. What are the units for: mass, length, time, temperature, amount of substance and volume? b.
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Ch 1 more Measurement - Chem 101 Nielson More practice...

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