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Unit 1 Test Topics by Day • Day 1 – Safety – Look over safety contract – Are all chemicals dangerous? • Day 2 – What is Chemistry/Scientific Method – – – – – What is Chemistry/Matter/Mass? What are the branches of chemistry? What is the Scientific Method? What are the parts of an experiment? Quantitative verses qualitative • Day 3 – Theories verses Laws – SI Units (what are the base units, remember one is tricky) – Dimensional Analysis • Remember micro (μ), milli (m), centi (c), deci (d), deca (da), kilo(k), and mega (M) – Derived Units, especially density (D=m/V) • Day 4 – Accuracy and Precision • What’s what? • Percent Error (|actual-experimental|/actual x 100) • Day 5 – Sig Figs • • • • What makes them a sig fig (4 rules) How many are in a number Adding/Subtracting and Multiplying/Dividing How to read equipment properly • Day 6 – Equipment • What is each piece of equipment called? • What is a use for the equipment? Day 7 and Day 8 • Classifying matter – Atom, pure substance, elements, molecules, compounds, mixtures – Homogeneous verses heterogeneous – Separating mixtures – States of Matter • Gasses, liquids, solids, plasma • Phase diagrams (you will have to interpret and label, not draw) • Changing states names (know that picture well) – Chemical verses physical Also look over Vocabulary Reality Checks Test Format (70 Questions, all of them have choices) 59 Multiple Choice (breakdown is below) Safety 3 Significant Figures 7 Matter / Branches of Chemistry 3 Chemical Equipment 5 Scientific Method / Data Type 4 Reading Chemical Equipment 4 Dimensional Analysis / SI Units 7 Phase Diagram 4 Density 2 States of Matter 2 Precision/ Accuracy 4 Mixtures 5 % Error 2 Seperating Mixtures 2 Scientific Notation 2 Physical verse chemical 3 5 physical or chemical 6 phase diagram Since it seemed like people struggled most with significant figures, here are a few practice problems • How many significant figures are in the following numbers: a) 450500 e) 900000009 b) 0.0070220 f) 50000000. c) 50000000 g) 9809200 d) 0.008102 h) 0.00000010000 a. 4 b. 5 c. 1 d. 4 e. 9 f. 8 g. 5 h. 5 Solve the following problems to the correct number of significant figures a) 6.78 x 103 2.2 x 104 b) 549 + 2.890 + 10.9 c) 0.000090040 x 5200 d) 89.000 – 8.90 e) 99.09 + 8.1 – 0.099 f) 56.000 x 1000 g) What is the density of a 150 mL liquid that has a mass of 58.99 g to the correct number of significant figures? a) 0.31 b) 563 c) 0.47 d) 80.10 e) 107.1 f) 60000 or 6 x 104 g) 0.39 g/mL