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Practice_EXAM_I

# 3 whichofthefollowingisinaccurate asiliconsi

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Unformatted text preview: lid and liquid, seeing the solid indicates it’s the heterogeneous mixture. If the mixture is made by liquid and liquid, seeing drops (by shaking it) or layer indicating it’s the heterogeneous mixture. 3. Which of the following is inaccurate? (a) silicon, Si (b) mercury, Hg (c) silver, Ag (d) chromium, Cr (e) iron, Ir Hint: For 11th, 9th and 10th editions: Check with front cover or periodic table and memorize them 4. What is the equivalent temperature for 98.6 Fahrenheit in Kelvin? (a) 37 (b) 310 (c) 471.6 (d) 594.8 (e) ‐273.1 Hint: For 11th ed.: p.p. 15‐17. For both 9th and 10th editions: p.p. 19‐20. Example 1.3. There is no direct conversion between the K and oF. So in this question, you must convert oF to oC first and then convert o C to K by applying two formulas: one is oC = (5/9) x (oF – 32) and the other is K = 273.15 + oC. 5. An unknown sample has a mass of 13.9 g and a volume of 17.4 mL. What is its density (g/mL)? (a) 0.798 (b) 1.04 (c) 3.16 (d) 4.62 (e) 5.07 Hint: For 11th ed.: p.p. 14‐15. For both 9th and...
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