103年 - 103 高雄醫學大學_學生轉系考試：普通化學#86804

科目：轉學考-普通化學 | 年份：103年 | 選擇題數：25 | 申論題數：0

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所屬科目：轉學考-普通化學

選擇題 (25)

1. Perform the following mathematic operations, and express the result to the correct number of significant figures.5ee071f40d436.jpg=?(A)188.1272(B) 188.127(C)188.13(D) 188.1 (E)188
 2. Which one of the following statements is correct? (A) The systematic name for TeO32- is tellurate ion.(B) The systematic name for NO2 is nitrogen(IV) oxide. (C) The systematic name for Mg3(SbO4)2 is magnesium antimonate. (D)The systematic name for GaAs is gallium arsenate. (E)The systematic name for Na2O2 is sodium oxide.
 3. A 100.-L flask contains a mixture of methane (CH4) and argon gases at 25℃. The mass of argon present is 228 g and the mole fraction of methane in the mixture is 0.650. The total kinetic energy for methane in the mixture is________ J. (A) 3.94 × 101(B) 3.94 × 104 (C)6.06 × 104(D) 6.06 × 101 (E)1.06 × 10
 4. Given that a sample of air is made up of nitrogen, oxygen and argon in the mole fractions 78% N2, 21% O2 and 1.0% Ar, the density of air at standard temperature and pressure is mg/L. (A) 1.26 × 104 (B) 12.6 × 10-1(C)1.26 × 101(D) 1.3 × 102 (E)1.3 × 103

 5. The overall reaction in a commercial heat pack can be represented as 4Fe(s) + 3O2(g) → 2Fe2O3(s), △H = -1652 kJ. How much heat is released when 1.00 g Fe is reacted with excess of O2? (A) -7390 J(B) -14760 J(C)-1650 J(D) -6600 J (E)-2200 J 

6. A hypothetical reaction, A + B +2C → 2D + 3E, has the rate law as Rate = -(△[A]/△t) = k[A][B]2 . An experiment is carried out when [A]0 = 0.01 M, [B]0 = 3.0 M and [C]0 = 2.0 M. The reaction is started, and after 8 s, the concentration of A is 0.0038 M. Based on the information, the concentration of A after 13 s is__________ M.(A)0.0038(B) 0.30(C)0.025(D) 0.0021 (E)0.00011
7. The rate constant for the gas-phase decomposition of N2O5, N2O5 → 2NO2 + (1/2)O2 has the following temperature dependence: k (s-1 ) = 4.9 × 10-3 at 338 K, 5.0 × 10-4 at 318 K, and 3.5 × 10-5 at 298 K. The activation energy for the reaction is_________ kJ/mol. (A) 91.5(B) 186(C)100(D) 19 (E)139

 8. At a particular temperature, K = 3.75 for the reaction SO2(g) + NO2(g)5ee073c1a6af9.jpg SO3(g) + NO(g). If all four gases had initial concentrations of 0.800 M, the calculated equilibrium concentration of SO3(g) for this reaction is_________ M. (A) 1.06(B) 1.26(C)0.80(D) 0.54 (E)0.24
9. A 0.050 M solution of the salt NaB has a pH of 9.00. The [OH- ] of a 0.010 M solution of HB is thus __________M.(A)4.6 × 10-11(B) 4.5 × 10-6 (C)3.0 × 10-9(D) 2.2 × 10-4 (E)2.2 × 10-5
 10. An excited hydrogen atom with an electron in the n = 5 state emits light having a frequency of 6.90 × 1014 s-1 . The principal quantum level for the final state in this electronic transition is calculated to be___________ . (A) 5(B) 4(C)3(D) 2 (E)1 2
 11. Which of the following statement correctly predict the molecular structure of each compound? (A) IF3, T-shaped(B) KrF2, V-shaped(C)SO2, linear(D) SeO3, trigonal pyramid (E)CF4, square planar
12. The standard enthalpies of formation for S(g), F(g), SF4(g), and SF6(g) are +278.8, +79.0, -775, and -1209 kJ/mol, respectively. Please use these data to estimate the energy of an S-F bond which could be_________ . (A) 342.5 kJ/mol(B) 357.8 kJ/mol(C)434 kJ/mol(D) 419 kJ/mol (E)201 kJ/mol
13. Which of the following statements is correct? (A) The removal of one electron in O2 decreases its bond order to 1.5. (B) The bond strength of OF is expected to weaken as an electron is removed to form the positive charged ion.(C)The bond strength of B2 is expected to increase as an electron is removed to form the positive charged ion. (D)CO+ is diamagnetic. (E)The bond order of N2+ is 2.5.
14. Titanium metal has a body-centered cubic unit cell. The density of titanium is 4.50 g/cm3 . Please calculate edge length of the unit cell to be _________pm. (A) 328(B) 32.8(C)1420(D) 142 (E)14.2
15. Carbon tetrachloride, CCl4, has a vapor pressure of 213 torr at 40℃ and 836 torr at 80℃. What is the normal boiling point of CCl4? (A) 50℃(B) 63℃(C)88℃(D) 81℃ (E)77℃
16. Consider the following solutions: 0.010 m Na3PO4 in water; 0.020 m CaBr2 in water; 0.020 m KCl; 0.020 m HF in water (HF is a weak acid). Assuming complete dissociation of the soluble salts, which salt dissolved in water would have the highest vapor pressure at 28℃? (A) 0.010 m Na3PO4(B) 0.020 m CaBr2(C)0.020 m KCl(D) 0.020 m HF (E)They all have the same vapor pressure
17. Which of the following mixtures would result in a buffered solution when 1.0 L of each of the two solutions are mixed? (A) 0.1 M KOH and 0.2 M CH3NH3Cl(B) 0.2 M KOH and 0.1 M CH3NH3Cl (C) 0.1 M KOH and 0.2 M CH3NH2(D) 0.1 M KOH and 0.1 M CH3NH3Cl (E)0.2 M KOH and 0.2 M CH3NH2
18. What is the pH at the equivalence point when 100.0 mL of 0.1 M HC7H5O2 (Ka = 6.4 × 10-5 ) titrated by 0.10 M NaOH?(A)4.19(B) 10.74(C)5.96(D) 7.89 (E)8.45 
19. What is the final concentrations of C2O42- (aq) in a solution prepared by adding 0.100 L of 0.200 M K2C2O4 to 0.150 L of 0.250 M BaBr2? (For BaC2O4, Ksp = 2.3 × 10-8 ) (A) 3.3 × 10-7 M(B) 1.5 × 10-19 M(C)0.07000 M(D) 0.300 M (E)0.160 M

20. What is the △Go for H2O(g) + (1/2)O2 ←→ H2O2(g) at 600. K using the following data: 

H2(g) + O2(g) ←→ H2O2(g)     K = 2.3 × 106 at 600K.

  2H2(g) + O2(g) ←→ 2H2O(g) K = 1.8 × 1037 at 600. K?

 (A) -7.1 × 104 J/mol(B) 1.4 × 105 J/mol(C)1.1 × 105 J/mol(D) 7.9 × 103 J/mol (E)1.0 × 103 J/mol

21. Consider the following reaction at 25℃: 2NO2(g) →N2O4(g). The values of △Ho and △So are -58.03 kJ/mol and -176.6 (J/K)(mol), respectively. Assuming △Ho and  △So  are temperature independent, the calculated value of K at 100℃ is__________ . (A) 2.54(B) 0.0789(C)0.789(D) 7.89 (E)0.254 3

22. Please calculate the value of the solubility product (Ksp) for iron(II) sulfide given the following standard reduction potentials: 5ee07676ddc3a.jpg (A) 2.28×10-10(B) 2.28×10-15(C)5.1×10-20(D) 1.7×10-25 (E)1.7×10-30

23. The atomic mass of 1 H is 1.00782 amu and the mass of a neutron is 1.00866 amu. The binding energy for carbon-12 (atomic mass 12.0000) is calculated to be________ J/nucleon. (A) 1.23 × 10-11(B) 1.23 × 10-12(C)1.23 × 10-13(D) 1.47 × 10-12 (E)1.47 × 10-11
24. Please rank the following complex ions in order of high to low frequency of light absorbed. (A) Co(CN)63- > Co(en)33+ > CoI6 3- > Co(H2O)63+ (B) Co(en)33+ > Co(CN)6 3- > Co(H2O)6 3+ > CoI63- (C) Co(en)3 3+ > Co(H2O)6 3+ > Co(CN)6 3- > CoI6 3- (D) Co(CN)63- > Co(en)3 3+ > Co(H2O)63+ > CoI6 3- (E)Co(en)3 3+ > Co(CN)63- > CoI6 3- > Co(H2O)6 3+

25. When heat is added to proteins, the hydrogen bonding in secondary structures in the proteins is disrupted. What are the algebraic signs of △H and △S for the protein denaturation process? (A) △H = - and △S = -(B) △H = - and △S = +(C)△H = + and △S = +(D) △H = + and △S = - (E)△H = △S = 0 4

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