supp-problems - Ordered according to coverage: Chapter 1 2...

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SUPPLEMENTAL PROBLEMS FOR CHEM 110 The problems are divided into chapters matching the book’s chapter numbers, and the chapters are arranged in order in which they are covered in lectures (see the syllabus). Ordered according to coverage: Chapter page 1 15 2 15 6 18 7 20 8 22 Organic 24 3 16 9 26 10 29 18 38 11 31 4 17 13 34 Reactions 39 5 17 15 36 Answer key 43 Ordered by chapter number: Chapter page 1 15 2 15 3 16 4 17 5 17 6 18 7 20 8 22 Organic 24 9 26 10 29 11 31 13 34 15 36 18 38 Reactions 39 Answer key 43 Supplemental Problems CHEM 110 - Spring 2011 13
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Supplemental Problems CHEM 110 - Spring 2011 14
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Chapter 1 1. 13.2 nm is equal to A. 1.32 10 6 cm B. 1.32 10 6 mm C. 1.32 10 8 cm D. 1.32 10 8 mm E. None of the above answers is correct 2. A 112.6 g mass of unknown material is submersed in 102 mL of water to yield a final volume of 126 mL. The apparent density of the unknown material is A. 0.908 g/mL B. 1.10 g/mL C. 0.21 g/mL D. Not determinable from the information given E. None of the above answers is correct 3. The answer to the calculation  12949552 . 20 925 . 8 6 . 4 13 . 18 0 . 94 63 . 1 025 . 1 to the correct number of significant figures is A. 20 B. 2.01 10 1 C. 2.0 10 1 D. 20.13 E. 2.012 10 1 4. The result of adding 1.17 10 2 and 8 10 3 is, to the correct number of significant figures A. 1.9 10 2 B. 1.97 10 2 C. 2.0 10 2 D. 0.02 E. None of the above answers is correct 5. (107.36 – 99.2) (5.4033 10 5 ) = 4.4090928 10 6 The above calculation, when expressed to the correct number of significant figures and properly rounded, should be written A. 4.4 10 6 B. 4.40 10 6 C. 4.41 10 6 D. 4.4090 10 6 E. 4.4091 10 6 Chapter 2 1. Chlorine exists primarily as 37 Cl and 35 Cl and has an average atomic weight of 35.453. The abundance of Cl with atomic weight of 35 is A. 23% B. 91% C. 77% D. 45% E. None of the above is within 10% of the correct answer 2. How many protons, neutrons and electrons are present in 2 17 8 O ? A. p=8, n=9, e=10 B. p=8, n=9, e=8 C. p=8, n=9, e=6 D. p=9, n=8, e=11 E. p=9, n=8, e=9 3. X and Y are two species, each consisting of one nucleus and a number of electrons. The two species are found to contain the same number of protons, the same number of neutrons, and different numbers of electrons. Which of the following statements about X and Y is correct? A. X and Y are both neutral atoms. B. X and Y are isotopes of one another. C. The two have different atomic numbers. D. At least one of the species is an ion. E. There is no correct answer above since A D are all incorrect. 4. Which of the following chemical formulas is NOT the expected one for the compound named? A. Ga 2 O 3 – gallium oxide B. AlCl 3 – aluminum chloride C. Li 2 O – lithium oxide D. MgBr – magnesium bromide E. SrI 2 – strontium iodide Supplemental Problems CHEM 110 - Spring 2011 15
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