1) How many Fe atoms equal a mass of amu? (Refer to the Periodic Table.) A) 56 B) 1 C) D) 26 E) none of the above

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1 CHEM Review for Final Exam (all chapters). Central. S118 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) How many Fe atoms equal a mass of amu? (Refer to the Periodic Table.) A) 56 B) 1 C) D) 26 1) 2) What is the mass of insoluble lead(ii) iodide (461.0 g/mol) produced from g of potassium iodid ( g/mol) and aqueous lead(ii) nitrate? 2) Pb(NO3)2(aq) + KI(s) PbI2(s) + KNO3(aq) A) 4.61 g PbI2 B) g PbI2 C) 2.31 g PbI2 D) g PbI2 E) 1.15 g PbI2 3) Using atomic notation, indicate the isotope having 30 p+, 35 n0, and 30 e-. A) Br B) Br C) Zn D) Zn E) Zn 3) 4) Subtract from and express the answer in scientific notation. A) B) C) D) E) ) 5) If g of potassium metal reacts with g of iodine, what is the mass of potassium iodide produced? A) g B) g C) g D) g E) impossible to predict from the given information 5) 6) The elements in Group IB/11 are classified as which of the following? A) representative elements B) transition elements C) inner transition elements D) rare earth elements E) transuranium elements 6) CHEM Review for Final Exam (all chapters). Central. S118, page 1

2 7) Methane, CH4, is used as an automobile fuel to reduce pollution. What is the coefficient of oxygen in balanced equation for the combustion of methane? 7) CH4(g) + O2(g) spark CO2(g) + H2O(g) A) 1 B) 2 C) 3 D) 4 8) The formula for mustard gas used in chemical warfare is C4H8SCl2 ( g/mol). What is the percentage of carbon in the compound? A) 20.16% B) 30.20% C) 44.57% D) 5.08% E) 7.55% 8) 9) If 68.0 cm3 of oxygen gas is collected over water at 45 C and 765 mm Hg, what is the volume of dry oxygen gas at STP? The vapor pressure of water at 45 C is 71.9 mm Hg. A) 53.2 cm3 B) 99.4 cm3 C) 79.7 cm3 D) 82.7 cm3 E) 58.8 cm3 9) 10) How many valence electrons are in an oxygen atom and an oxide ion? A) 2 and 8, respectively B) 8 and 6, respectively C) 6 and 8, respectively D) 8 and 10, respectively 10) 11) What is the chemical formula for tetraphosphorus trisulfide (the flammable compound on match tips that causes ignition)? A) P4S3 B) PS3 C) P4S 11) D) P3S4 12) Which of the following compounds has physical and chemical properties similar to the element potassium? A) KNO3 B) KI C) K2CrO4 12) 13) What is the core notation for the electron configuration of an aluminum ion? A) [Ne] 2s2 2p1 B) [Ne] 3s2 3d1 C) [Ne] D) [Ne] 3s2 3p1 13) CHEM Review for Final Exam (all chapters). Central. S118, page 2

3 14) Classify the following type of stoichiometry problem: How many liters of carbon monoxide gas react with an excess volume of oxygen gas to give 125mL of carbon dioxide gas? A) mass mass problem B) mass volume problem C) volume volume problem D) mole mole problem 14) 15) A piece of jade is added to a 100-mL graduated cylinder with 45.0 ml of water. If the resulting water level is 60.5 ml, what is the volume of the jade? A) 39.5 ml B) 55.0 ml C) 15.5 ml D) 84.5 ml 15) 16) One milliliter of helium gas contains 26,900,000,000,000,000,000 atoms at normal temperature and pressure. Express the number of atoms in scientific notation. A) B) C) D) E) ) 17) A sample of air at 7.50 atm is cooled from 448K to 224K. If the volume remains constant, what is the final pressure? A) 12.3 atm B) 15.0 atm C) 3.75 atm D) 6.15 atm E) 4.57 atm 17) 18) What is the coefficient of oxygen gas after balancing the following equation? 18) P(s) + O2(g) P2O5(s) A) 2 B) 1 C) 4 D) 5 19) At the same temperature, which of the following gases contains molecules with the fastest average velocity? A) carbon monoxide, CO B) carbon dioxide, CO2 C) nitrogen monoxide, NO D) nitrogen dioxide, NO2 E) The average velocity is the same. 19) 20) Predict the number of valence electrons for a Group VIA/16 element. A) 4 B) 2 C) 8 D) 6 E) 16 20) CHEM Review for Final Exam (all chapters). Central. S118, page 3

4 21) What is the electron configuration for an atom of nickel? A) 1s2 2s2 2p6 3s2 3p6 4s2 3d8 B) 1s2 2s2 2p6 3s2 3p6 4s2 4p8 C) 1s2 2s2 2p6 3s2 3p6 3d8 D) 1s2 2s2 2p6 3s2 3p6 4s2 4d8 22) Which of the following changes is evidence of a chemical reaction? A) A change in color is observed. B) A change in physical state is observed. C) A change in volume is observed. 21) 22) 23) A sample of carbon monoxide gas occupies 125 ml at 20.0 C and 455 mm Hg. If the volume of gas is 55.5 ml at 898 mm Hg, what is the Celsius temperature? A) -207 C B) 18 C C) 257 C D) 1030 C E) -16 C 23) 24) In an experiment, g of aluminum reacts to yield g of aluminum oxide. Using the conserva mass law, predict the mass of reacting oxygen gas. 24) Δ 4 Al(s) + 3 O2(g) 2 Al 2O3(s) A) g O2 B) g O2 C) g O2 D) g O2 E) g O2 25) Magnesium metal is one of the least dense elements (d = 1.74 g/cm3). What is the volume of a 10.0 g sample of the metal? A) 174 cm3 B) 57.5 cm3 C) 10.0 cm3 D) 5.75 cm3 E) 17.4 cm3 25) 26) Which of the following is a basic step in the scientific method? A) analyze experimental data and propose a hypothesis B) test a hypothesis and state a theory or law C) perform an experiment and collect data 26) 27) Which of the following is equal to 1.00 mole of substance? A) potassium atoms, K B) potassium bromide formula units, KBr C) bromine molecules, Br2 27) CHEM Review for Final Exam (all chapters). Central. S118, page 4

5 28) Nitroglycerin is an explosive manufactured from glycerin and nitric acid. If the formula is C3H5O3(NO2)3, what is the number of atoms in one molecule? A) 18 B) 17 C) 42 D) 20 29) How many significant digits are in the mass measurement g? A) 1 B) 2 C) 3 D) 4 28) 29) 30) Which of the following chemical symbols corresponds to manganese? A) Mn B) Mg C) Ma D) Sn 30) 31) The electronegativity value of C is 2.5. Given the electronegativity of Cl, Br, and I (3.0, 2.8, and 2.5, respectively), which of the following has nonpolar bonds? A) CCl4 B) CI4 C) CBr4 32) What is the molecular shape of a silicon dioxide molecule, SiO2? A) bent B) linear C) tetrahedral D) trigonal planar E) trigonal pyramidal 33) If g of arsenic react with selenium to give g of arsenic selenide, what is the empirical formula of the product? A) AsSe B) As5Se2 C) As2Se5 D) As3Se2 E) As2Se3 31) 32) 33) 34) What volume of carbon monoxide gas at STP reacts to produce 759 g of iron? 34) Fe2O3(l) + CO(g) 1500 C Fe(l) + CO2(g) A) 914 L CO B) 305 L CO C) 457 L CO D) 203 L CO E) 152 L CO 35) How many moles of helium occupy a volume of 5.00 L at C and 5.00 atm? (R= atm L/mol K) A) 5.00 mol B) 25.0 mol C) 6090 mol D) 1.64 mol E) mol 35) CHEM Review for Final Exam (all chapters). Central. S118, page 5

6 Answer Key Testname: CHEM REVIEW FOR FINAL EXAM (ALL CHAPTERS). CENTRAL. S118 1) B 2) E 3) E 4) E 5) C 6) B 7) B 8) B 9) A 10) C 11) A 12) E 13) C 14) C 15) C 16) B 17) C 18) D 19) A 20) D 21) A 22) A 23) E 24) C 25) D 26) D 27) D 28) D 29) D 30) A 31) B 32) B 33) E 34) C 35) E CHEM Review for Final Exam (all chapters). Central. S118, page 6