Download Old Exam Questions from Dean Campbell - Chemistry Chapters 1-8 - Prof. Charles Campbell and more Exams Chemistry in PDF only on Docsity! Old Exam Questions from Dean Campbell Chapters 1-3 1. Chlorine-35 has an isotopic mass of 34.96885. Chlorine-37 has an isotopic mass of 36.96590. Given the atomic weight of chlorine as 35.4527, calculate the fractional abundance of chlorine-37. a) 0.758 b) 0.242 c) 0.500 d) 0.804 e) 0.196 2. A sample has a mass of 24.2468 g. When the sample is placed into a graduated cylinder with a mercury level of 10.3 mL, the level is raised to 24.9 mL. What is the density of the sample? a) 0.830 g/cm3 b) 1.660 g/cm3 c) 0.602 g/cm3 d) 1.204 g/cm3 e) 0.830 g/mL 3. Diamond has a density of 3.51 g/cm3. If the Kohinoor Diamond has is 108 carats, what is the volume of the diamond in cubic inches? (NOTE: 1 carat = 0.200 g) 4. What is the temperature of a 65OF room in: a) degrees C? b) Kelvin? 5. A person is 23.5 lbs and 34.0 inches tall. What is her mass in kg and her length in cm? 6. For the most common ion of calcium-40, list the: a) ion charge b) number of protons c) number of neutrons d) number of electrons 7. Phytic acid has the empirical formula CH3O4P and a formula weight of 660.04 g/mol. What is its molecular formula? a) CH3O4P b) C3H9O12P3 c) C6H18O24P6 d) C8H24O32P4 8. Average 32.15, 3.30 x 101, 42.567 using significant figures correctly: 9. Name the following: a) NaC2H3O2 b) (NH4)2CrO4 c) NO2 d) PCl5 10. Name the following: a) CoSO4*5H2O b) KClO4 c) HF d) Cr(OH)3 11. Write formulas for the following: a) potassium nitrite b) ammonium cyanide c) chlorine monoxide d) chlorous acid 12. How many atoms of oxygen are there in 0.686 g of sugar (C6H12O6)? a) 6 b) 180 c) 6.88 x 1021 d) 1.38 x 1022 e) 1.15 x 1021 13. Complete and balance the following molecular reactions: a) calcium hydroxide + phosphoric acid à calcium phosphate + water b) C6H6 + O2 à 14. Which contains more total sulfur by mass? a) 100.0 g of magnesium sulfate b) 100.0 g of calcium sulfite 15. For the reaction: 2H2S +3O2 à 2H2O + 2SO2, how many grams of SO2 are produced from 78.3 g of H2S? 16. For the reaction: 2H2S +3O2 à 2H2O + 2SO2, 39.2 g of SO2 are produced from the reaction of 26.8 g of H2S and 184.2 g of O2. What is the percent yield? 17. What is the mass percent of water in magnesium sulfate heptahydrate? 18. Analysis of polyvinyl chloride (a flame retardant polymer used in artificial Christmas trees and garland) reveals that it is 38.44% C, 4.84% H, and 56.73% Cl by mass. What is the empirical formula for this polymer? a) CHCl b) CH2Cl c) C2H2Cl2 d)C2H3Cl e) C2HCl3 Chapters 4-5 1. 50.0 mL of sulfuric acid was titrated with 24.35 mL of 1.0039 M sodium hydroxide. What was the concentration of the sulfuric acid solution? a) 0.122 M b) 0.183 M c) 0.244 M d) 0.488 M
