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self test chp 1-6

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University of Toronto Scarborough
Ann Verner

CHMA10H Chapters 1-3 Self Assessment test 2008 To get the most out of this exercise, you should review the lecture notes and text book before you do this quiz. You should not take longer than 20 minutes to answer these 10 questions. SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 1) The element Se can be found in period _____ and group _____ of the periodic table. 2) The quantity 1.0567 qt rounded to two significant figures is _____ qt. 3) Isotopes have the same number of _____ but different numbers of _____ in their nuclei. 4) The formula of iron(III) oxide contains _____ iron(III) and _____ oxide ions. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 5) Elements A and Q form two compounds, AQ and A2Q. Which of the following must be true? A) (mass Q)(mass A) for AQ must be 12 (mass Q)(mass A) for A2Q. B) (mass Q)(mass A) for AQ must be 2 times (mass Q)(mass A) for A2Q. C) (mass Q)(mass A) for AQ must equal (mass Q)(mass A) for A2Q. D) (mass Q)(mass A) is one for AQ, and 12 for A2Q. 6) An atom has 13 neutrons and 10 electrons. If it is a cation with a charge of +1, what is its correct symbol? A) 26 13 Al+ B) 13 11Na+ C) 24 11Na+ D) 13 10Na+ E) 23 10Ne+ 7) Which of the following statements does not describe a physical property of chlorine? A) Chlorine combines with sodium to form table salt. B) The color of chorine gas is green. C) The freezing point of chlorine is -101C. D) The density of chlorine gas at standard temperature and pressure is 3.17 gL. 8) A 4.05 g sample of a compound containing only C, H, and O was burned completely. The only combustion products were 10.942 g CO2 and 4.476 g H2O. What is the empirical formula of the compound? A) CH2O B) C7H7O C) C7H14O7 D) C6H12O E) C7H14O 9) What is the identity of substance X if 0.380 mol of X weighs 17.5 g? A) NO3 B) N2O C) N2O4 D) NO2 10) Choose the INCORRECT name formula combination. A) HNO2 nitrous acid B) Ba(OH)2 barium hydroxide C) LiCN lithium cyanide D) Na2CO3 sodium carbonate E) Fe2(SO4)3 iron(III) sulfite Answer Key Testname: CHAPTER 13 REVIEW 1) 4, 6A 2) 1.1 3) protons, neutrons 4) 2, 3 5) B 6) C 7) A 8) E 9) D 10) E
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