i. acetone nail polish evaporates at room temperature ii. dew forming on a car window in the morning iii. potassium metal bursts into flame in water

Transcription

1 1. Acetylsalicylic acid, 9 8 O 4, is is better known as aspirin. What is the weight percent of carbon in this compound? A % B % % D % E % 2. Which of the following processes would be a physical change? A. i only B. ii only. iii only D. i and ii E. i and iii i. acetone nail polish evaporates at room temperature ii. dew forming on a car window in the morning iii. potassium metal bursts into flame in water 3. A hypothetical element has three naturally occurring isotopes with masses of , , and The percent abundance of the first isotope is % and the second is %. What is the average mass of this element? A B D E Naturally occurring iodine has an atomic mass of A mg sample of iodine is accidentally contaminated with mg of 129 I, a synthetic radioisotope of iodine used in the treatment of certain diseases of the thyroid gland. The mass of 129 I is Find the average mass of the iodine atoms in this sample. A B D E Page 1

2 5. What is the correct answer to the following equation? A. 1.3 x 10-8 B x x 10-8 D. 2.9 x 10-2 E Which of the following answers correctly indicates the number of protons, neutrons, and electrons contained in the isotope? 96 Mo 4+ A. 96 protons, 42 neutrons, and 92 electrons B. 96 protons, 54 neutrons, and 28 electrons. 42 protons, 54 neutrons, and 42 electrons D. 42 protons, 54 neutrons, and 38 electrons E. 46 protons, 54 neutrons, and 42 electrons Page 2

3 7. Which of the following structures represents the structural formula of an alkene? A. R O R B.. D. E. O R O 8. odeine contains 72.20% carbon, 7.08% hydrogen, 4.68% nitrogen and the remainder is oxygen. It has a molecular weight of g/mol. What is its molecular formula? A N 2 O 2 B N 3 O NO 3 D N 4 O 2 E N 2 O 3 9. Which of the following measurements would be the same length as 540. pm? A x m B x 10-5 µm x cm D x 10-7 mm E nm Page 3

4 10. Which of the followng statements is/are correct? i. 2.5 mm = 2.5 x 10 3 m ii. 7.5 µm = 7.5 x 10-6 m iii. 5.0 x pm = 5.0 m A. i only B. ii only. iii only D. i and ii E. ii and iii 11. Which of the following amounts would contain the fewest atoms? A. 4.0 g u B. 4.0 g Mg. 4.0 g Ba D. 4.0 g e E. 4.0 g a 12. A cube of pure gold has side dimensions of in. ow many gold atome would the cube contain. Gold has a density of 19.3 g cm -3 and melts at 1064, A x B x x D x E x A Boeing 747 airplane consumes kerosene at a rate of 9421 L per hour. The density of kerosene is g/ml. What mass of kerosene would be burned on a flight of 6.0 hour duration? Express your answer in pounds. (1.0 kg = 2.2 lbs) A. 12,000 lbs B x 10 5 lbs x 10 3 lbs D x 10 4 lbs E x 10 4 lbs 14. An organic compound the containing 4 carbon atoms and only single - bonds would be called A. propane B. butane. propene D. butene E. ethane Page 4

5 15. All of the following elements will form cations. Which one will form an ion with only one charge state? A. iron B. manganese. silver D. tin E. lead 16. Which of the following is the correct formula for sodium dichromate? A. Nar 2 O 7 B. NarO 4. Na 2 ro 4 D. Na 2 r 2 O 7 E. Na 3 ro Given the following conversion factors, find the number of picas equal to a length of 5.40 x 10-2 rods. All of the factors may not be needed. 1 rod = ft; 2.54 cm = 1 in; 3 ft = 1 yard; 1 fathom = 183 cm; 1.00 ft = cm; 5280 ft = 1 mi; and 1 pica = fathoms A picas B picas x 10 6 picas D picas E picas 18. Which of the following statements is/are correct? i. a(lo 2 ) 2 is the symbol for calcium chlorite ii. VF 5 would be called vanadium pentafluoride iii. sodium phosphide would be symbolized as Na 3 PO 3 A. i only B. iii only. i and iii D. ii and iii E. i, ii, and iii 19. Which of the following statements is correct? A. a is an alkali metal B. magnesium is a transition metal. neon is a diatomic gaseous element D. bromine is a halogen E. serium is in the same family as oxygen Page 5

6 20. alculate the weight of 8.25 x molecules of O 2 gas. A x 10-2 g B x g x 10-5 g D x g E g 21. Butyric acid, 4 8 O 2 is responsible for the rancid odor of butter. What is the weight percent of carbon in this compound? A % B %. 28.6% D % E % 22. exane, 6 14, burns according to the reaction shown below. ow many grams of carbon dioxide would be released if g of hexane were burned in excess oxygen? (l) + 19 O 2 (g) -> 12 O 2 (g) O (l) A g B g g D g E g 23. Titanium metal, density of 4.54g/cm 3, is used to make golf clubs. A rectangular bar of titanium which weighs 45.7g measures 1.84 cm in length and 2.24 cm in width. What is the height of the bar? A cm B cm. 252 cm D cm E cm 24. When the following equation, for the combustion of octane, is balanced correctly, what is the sum of the coefficients? 3 7 O + O 2 > O O A. 13 B D. 27 E. 21 Page 6

7 No. in Q-Bank No. on Test B D A E D D B D B A B B D B A D A B B orrect Answer Answer Key for Test Practice Exam 1, 9/19/13 Page 1

8 Statistics for Test Practice Exam 1. Total questions: 24 Key Word Total Difficulty Level Total None Total None 0 None 0 Essay 0 LO 1.1 ID State 1 Easy 9 Short Answer 0 LO 1.2 Sci. Notation 1 Moderate 10 Fill in Blank 0 LO 1.3 SI Units 0 ard 4 Matching 0 LO 1.4 Density 2 Max Diff 1 Identification 0 LO 1.5 Sig Figs 0 easy 0 True or False 0 LO 1.6 Dimensional Analysis 4 moderate 0 Multiple hoice 24 LO 2.1 Def. & mult proportion 0 difficult 0 Matching Question 0 LO 2.2 Isotopes, p+, n0, e- 0 max difficult 0 LO 2.3 Element Symbols 0 Medium 0 LO 2.4 Parts of PT 1 Maximum Difficulty 0 LO 2.5 Ave Mass 0 hard 0 LO 2.6 Nomenc. Molecular 2 max diff 0 LO 2.7 Name Binary Acids 2 LO 2.8 Organic Nomenc. 1 LO 2.9 Emp. Formula Name Ionic cmpds Polyatomic names Oxo Acids 0 LO 3.1 Formula Mass 2 LO 3.2 % composition 1 LO 3.3 hem Equations 2 LO 3.4 g to mole to # part. 1 LO 3.5 %comp. to emp. form 0 LO 3.6 ombustion Analysis 1 LO 3.7 Stoich 2 LO 3.8 Limiting Reactants 0 LO 3.9 1