※ [本文转录自 NTU-Exam 看板] 作者: zeiyuhu (蛋蛋) 看板: NTU-Exam 标题: [试题] 95上 佘瑞琳 普通化学甲上 期中考 时间: Sat Nov 18 14:26:13 2006 课程名称︰普通化学甲上 课程性质︰大一必修 课程教师︰佘瑞琳 开课学院：理学院 开课系所︰地质系/农化系/大气系 考试时间︰2006/11/17 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : I.Multiple choice(2 points each,30%) d 1. Which one of the following is the smallest mass? (a)12kg (b)1.2*10^-2Mg (c01.2*10^15pg (d)1.2*10^10ng d 2. Considering the significant figures,give the answer to 15.9999-5.11+11=(a)21.8899 (b)21.89 (c)21 (d)22 b 3. Which of the following is the extensive property? (a)density (b)enthalpy (c)boiling point (d)concentration ad 4. For the mass no119 atomic no50 Sn4+,which of the following statement is correct?(a)the atomic number is 50 (b)the number of protons is 54 (c)the number of electrons is 50 (d)the number of neutrons is 69 a 5. Which one of the following is strong elecyrolyte? (a)LiOH (b)HClO (c)HCOOH (d)CH3OH acd 6. Will precipitation occur when the following solutuons are mixed? (a)CoBr2 and AgNO3 (b)NaI and NH4Cl (c)K2SO4 and Pb(NO3)2 (d)Na2S and Cu(NO3)2 bc 7.Which of the following is acid-base neutralization reaction? (a)Zn+HCl (b)NH3+HCl (c)MgO+HCl (d)AgNO3+HCl acd 8. Which one of the following is true concerning internal energy,E? (a)it is a syaye function (b)it can be measured exactly (c)E=Efinal-Einitial (d)E=q+w d 9. A gas is confined to a cylinder under constant atomsperic pressure. When the gas undergoes a particular chemical reaction, it releases 81kJ of heat to its surroundings and does 17kJ of P-V work on its surroundings. (a)q=81kJ (b)w=17kJ (c)E=98kJ (d)h=-81kJ abd10. Which of the following is standard enthalpy of formation values is not zero at 25C? (a)CH4(g) (b)Br2(g) (c)Na(s) (d)I2(g) c 11. Which of the following sets of quantum numbers are acceptable? (a)(1,0,+1/2,-1/2) (b)(2,2,1,+1/2) (c)(4,3,-2,+1/2) (d)(3,2,1,1) d 12. An atom of a certain element has 20elecyrons, (a) the ground- state electron configuration is:1s^2 2s^2 2p^6 3s^2 3p^6 3d^2 (b) this element is classified as transition metals (c) the atoms of the element are paramagnetic (d) the atoms of the element usually from M2+ ions b 13. Which of the following sets is isoelectronic? (a)N,O,F (b)N3-,O2-,F- (c)Be2+,Mg2+,Ca2+ (d)Fe2+,Fe3+ d 14. The n=5 to n=3 transition in the Bohr hydrogen atom corresponds to the ___of a photon with a wavelength of ___ nm. (a)absorption,657 (b)absorption,1280 (c)emission,657 (d)emission,1280 d 15. Which quantum number defines the shape of an orbital? (a)spin (b)magnetic (c)principle (d)azimuthal(angular momentum) II. Problem(70%) 1.Name or give the chemical formula for the following compounds:(20%) (a)NF3 (b)Al(NO3)3 (c)HClO (d)NaHCO3 (e)potassium hydrogen phosphate (f)CH3OH (g)CH2=CH2 (h)2-butanol (i)2,3-dimethylhexane (j)sulfurous acid 2.Naturally occurring magnesium has the following isotopic abundances: (a)What is the averageatomic mass of Mg? (b)Sketch the mass spectrum ofMg Isotope Abundance Atomic mass(amu) 24Mg 78.99% 23.98504 25Mg 10.00% 24.98584 26Mg 11.01% 25.98259 3.A solution of 100.0mL of 0.200M KOH is mixed with a solution of 200.0 mL Of 0.150M NiSO4. (a)Write the balanced chemical equation for reaction that occurs.(b)What precipitate forms?(c)What is the limiting reagent? (d)How many grams of this precipitate form?(e)What is the concentration of each ion that remains in solution?(Ni=58.69,S=32.07,O=16.00,K=39.10, H=1.01) 4.Pure acetic acid,known as glacial acetic acid,is a liquid with a density of 1.049g/mL at 25C.Calculate(a)the molarity of glacial acetic acid,and (b)the molarity of a solution of acetic acid made by dissolving 20.00mL of glacial acetic acid at 25C in enough water to make 250.0mL of solution 5.A 0.5865g sample of lactic acid(HC3H5O3) is burned in a calorimeter whose heat capacity is 4.812kJ/C. The temperature from 23.10C to 24.95C. Calculate the molar heat of combustion of lactic acid. 6.The yellow light given off by a sodium vapor lamp used for public lighting has a wavelengh of 589nm. Whatis the frequency of this radiation? Calculate the energy of one photon of yellow light. 7.Arrange the following atoms:C,N,Si,Pin order of incerasing first ionization energy. 8.(a)What is the designation for the subshell with n=4andl=3? (b)How many orbitals are in this subshell? (c)Indicate the values of ml for each of these orbitals. 9.List the following ions in order of incersing ionic radius: N3-,Na+,F-,Mg2+,O2- --

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