课程名称︰普通化学丙 课程性质︰必修 课程教师︰佘瑞琳 开课学院： 开课系所︰生工系 考试日期（年月日）︰2009/4/13 考试时限（分钟）：120min 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : R=8.314 J/mol*K = 0.082 L*atm/mol*K; C=2.9979x10^8 m/s; h=6.626*10^-34 J-s Atomic mass (g/mol): F=19.0;Ne=20.2;O=16.0;N=14.0;C=12.0;H=1.0;He=4.00 I.选择题（不一定是单选）40％ 1.Which of the followings has three significant figures in the answer? (a)2.08% (b)(765.6-22.3)0.354/760*0.11*298.15 (c)2.1*10^3 J (d)4.033+88.1 2.Which of the following coversion is correct? (a)-186度c＝87k (b)28torr=28cmHg (c) 5μL=5*10^-6 L (d)74pm=74*10^15 m 3.For the ion, 55 2+ it contains Mn 25 (a)25 protons (b)25 neutrons (c)25 electrons (d)53nucleons 4. Which of the following elements is an element of metalloids? (a) Sn (b)S (c)Si (d)P 5.Which of the following compunds would be soluble in water at room temperature (a) Pb(OH) (b)NH CH COO (c)HgCl (d)Ag S 2 4 3 2 2 6.Which of the following is weak electrolyte (a)HCOOH(formic acid) (b)HNO (c)CH NH (d)LiOH 2 3 2 7.Which of the following is redox reaction (a) HCl(aq)+Mg(s) (b) HCl(aq)+MgO(s) (c) CuO(s)+H2 (d) Pb(NO3)2(aq)+K2CrO4(aq) 8.When an experiment required a sorrce of carbon dioxide,a student combined 1.4g of sodium bicarbonate(NaHCO3,84)with excess hydrochloric acid.If the CO2 produced is collected at 722torr and 17度C, what volume will the gas occupy? (a)0.42L (b)0.042L (c)0.025L (d)0.0025L (e)none of the above 9.Consider two identicl glass bulbs, each having a volume of 2.00L. The bulbs are evacuated, and then one is filled with oxygen and the other with helium. When filled,each bulb is at a pressure of 500torr and 50度C,Which of the following statement is correct? (a)There are more molecules in the oxygen bulb (b)The density is higher in the oxygen bulb (c)The average kinetic energy of molecules is higher for helium in the bulb (d)The average molecular speed is same for two gases in each bilbs 10.A stock bottle of nitric acid indicated that the solution is 67.0% HNO3 by mass and has a density of 1.4mL. Caculate the molarity of the solution (a)0.0148 (b)10.6 (c)14.9 (d)22.2 11.Which of the following shows correct ordering (a) First ionization energy:Li<B<O (b) Energy: infrared(IR)<visible<ultraviolet(UV) (c) Ionic radius:Li+ < N3- < O2- (d) Electronegativity:N<O<F 12.Which of the following setsof quantum number is allowed (a) (2,2,0) (b) (0,0,0) (c) (7,0,0) (d) (3,1,-1) 13.Which of the following is CFCs(chlorofluorocarbons)? (a)CF2=CF2 (b)-(CF2CF2)n- (c)CCl2F2 (d)CHCl3 14. Which of the following molecule has tetrahedral geometry? (a)SF4 (b)SiCl4 (c)NH3 (d)XeF4 15.Rank the following in order of increasing energy gap: (a)Mg<Si<Si doped with P<I2 (b)Mg<Si doped with P<Si<I2 (c)I2<Si<Si doped with P<Mg (d)I2<Si doped with P<Si<Mg 16.Which of the fllowing is an element of halogens? (a)F2 (b)He (c)N2 (d)Fe 17.Which of the following molecules is expected to have the largest a value for the van der Walls equation? (a)CH4 (b)F2 (c)CO2 (d)Ne 18.From the following list of observation, choose the one that most clearly supports that electrons have wave properties (a)emission spectrum of hydrogen (b)the photoelectric effect (c)scattering of alpha particles by metal foil (d)diffraction (e)cathode"rays" 19.Which of the following is determined by the principal quantum number, n, of the electron in a hydrogen atom (a)the energy of the electron (b)the minimum wavelength of the light needed to remove the electron from the atom (c)the size of the corresponding atomic orbital(s) (d)the shap of the corresponding atomic orbital(s) 20.Which of the following statements about quantum theory is correct? (a)The momentum and position of an electron cannot be determined simultaneously (b)Lower energy orbitals are filled with electrons before higher energy orbitals (c)When filling orbitals of equ al energy, two electrons will occpuy the same orbital before filling a new orbital (d)No two electrons can have the same four quantum numbers II.简答（如需计算需详列算式）60％ 1.According to the giving line structure, write the corresponding structural formula of methyl methacrylate ║ ─╨─╥─O─ ║ O 2.Give the systematic names of the following compounds (a)CS2 (b)Ca(OH)2 (c)Fe2O3 (d)H2SO4 3.Write the correct formulas of the followings: (a) potassium hydrogen phosphate (b)magnesium nitride (c)2-methylbutene 4.Identify and name the functional groups of the following molecule: O ║ H3C─┬╨OH │ NH2 5.The explosive known as RDX contains 16.22% carbon,2.72% hydrogen, 37.84% nitrogen,and 43.22% oxygen by mass (a)Determine the empirical formula of the compound (b) The molar mass of RDX is about 220g/mol; find the molecular formula of RDX 6.Small quantities of hydrogen gas can be prepared by the following reaction Zn(s)+H2SO4(aq)→ZnSO4(aq)+H2(g) How many moles of H2 can be prepared from 25.0 mL of 6.00M H2SO4 and excess zinc? what's the volume of H2 gas at 27度C and 1 atm? 7.Blood alcohol levels are usually reported in mass percent: A level of 0.10 means that 0.10 g of alcohol(C2H5OH) was present in 100 g of blood. Find the molarity of alcohol in the blood of a person with a blood alcohol level of0.12(The density of blood is 1.2g/mL) 8.An experiment is designed to determine the effect of sulfur dioxide, one of the EPA criterion pollutants, on plants. Among the variations used is a mixture that has mole fractions given in the table ┌───────┬───┬────┬───┬───┐ │ Gas │ N2 │ O2 │ H2O │ SO2 │ ├───────┼───┼────┼───┼───┤ │Mole fraction │ 0.751│ 0.149 ｜ 0.080│ 0.020｜ └───────┴───┴────┴───┴───┘ (a) If the desired total pressure is 750 torr, what is the partial pressure of SO2 gas?(b)If the gas is to be in a 15.0 L vessel held at 30度C ,how many moles of SO2 is needed? 9.In a photoelectric effect experiment, ultraviolet light with a wavelengh of 337 nm was directed at the surface of a piece of potassium metal. The kinetic energy of ejected electrons was measured as 2.30*10^-19J. (a)What's the energy of UV photon? (b)What is the electron binding energy for potassium? - 10.For the nitrate ion, NO (a)draw the Lewis structure;(b) indicate the 3 hybridization of the central atom, N; (c)show the formal charge of each atom. (d)What is the geometry of the ion? 11.For the diatomic molecule N2,(a)draw the molecular orbital energy level diagram,(b)write the electron configuration, (c)determine the bond order, and (d) indicate the magnetic properties(that is diamagnetic or paramagnetic) (e) Show the HOMO-LUMO energy gap in N2 molecule. ------------------------------------------------------------------------------- 题目真多....打超久=_= --

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