Bonly protons.Cequal numbers of electrons and protons.Dequal numbers of protons and neutrons.Eneutrons and protons.4 Which monatomic ion has an atomic number of 13and 10 electrons?AAl3+BB3+CN3-DV3+ENe3-5 How many neutrons are there in one 37Cl atom?A37B17C18D20E546 In what region of the periodic table are the atoms withthe smallest covalent atomic radii found?Aupper leftBlower leftCupper rightDlower rightEupper centre7 The first ionization energy of an isolated atom, X(g), isAthe minimum energy required to remove anelectron from X(g).Bthe maximum energy required to remove anelectron from X(g).Cthe energy released when X acquires an electronto form X-(g).Dthe minimum energy required to remove anelectron from X-(g)Ethe maximum energy required to remove anelectron from X-(g).AVOGADRO EXAM 2001 - ANSWERS
2001 UNIVERSITY OF WATERLOO AVOGADRO EXAM /38 Which one of the following elements would youexpect to be the most similar in chemical properties tooxygen?AcarbonBnitrogenCfluorineDneonEsulfur9 Which of the following is nota mixture?AbrassBsodium chlorideCairDseawaterEstainless steel10 Noble gases are usually unreactive but a fewcompounds of the noble gases have beensynthesized. Which one of the following chemicalbonds is least likely to form?AXe-OBXe-FCXe-NDKr-FEAr-F11 Which compound contains both covalent and ionicbonds?AHClO4BCsClCgraphiteDKCNEwater12 A U-tube mercury manometer is open on the rightarm and connected to a gas sample at the other armas shown below. The atmospheric pressure is 101kPa and the difference in levels of mercury is 20 cm.What is the pressure of the gas in the bulb?A121 kPaB104 kPaC94 kPaD98 kPaE128 kPa13 A 140-g sample of nitrogen gas in a rigid containerexerts a pressure of 203 kPa at 127oC. What is thevolume of the container?A82 LB26 LC110 LD160 LE52 L14 A 7.20-L flask contains 20.0 g of an unknown gas at apressure of 104 kPa and a temperature of 87oC.What is the molar mass of the gas?A16 g mol-1B19 g mol-1C40 g mol-1D80 g mol-1Enone of the aboveR= 8.3145 kPa L K-1mol-1N, 14.01 g mol-10oC = 273.15 K20 cmgas760 mm Hg = 101 kPaNote: Some teachers commented thatHClO4has ionic and covalent bonds. To thebest of our knowledge, pure HClO4is aliquid comprised of molecules with no ionicbonds. The monohydrate, HClO4$H2O,however, is an ionic solid comprised of H3O+and ClO4-ions.
2001 UNIVERSITY OF WATERLOO AVOGADRO EXAM /415 What is the total pressure in a 4.55-L container if itcontains 0.0410 mol O2, 0.173 mol N2and 0.056 molHe, at a temperature of 167oC?A250 kPaB82.4 kPaC217 kPaD0.0232 kPaE2.14 kPa16 Which of the following gaseous compounds behavesmost like an ideal gas at 298 K and 101 kPa?ANOBH2SCHFDN2ESO317 What is the correct formula of the stable compoundthat contains only aluminum and sulfate ions?
- Spring '14
- Atom, Sulfuric acid, mol