110年 - [非官方正解]110 國立臺北科技大學_碩士班招生考試_化學工程與生物科技系生化與生醫工程碩士班：普通化學#102067

3. How many protons, neutrons, and electrons are in ? (A)25 protons. 32 neutrons, 27 clectrons (B)27 protons, 25 neutrons, 32 electrons (C)25 protons, 27 neutrons, 32 electrons (D)27 protons, 32 neutrons, 25 clectrons (E)32 protons, 27 neutrons. 30 electrons

4. A compound contains 49.48% C. 5.15% H, 16.50% O, and 28.87% N by mass. What is the empirical formula of this compound? (A)C₄H₅N₂O (B)C₆H₅O₃N (C) (D)C₄H₈O₃N (E)

6. At a temperature, a 5 liter flask contains 5 moles of Cl₂ gas, 1.5 mole of NOCI gas, and mole of NO gas at chemical equilibrium. What is the for the following reaction?
(A) (B) (C)(D) (E)

7. At 25°C, what is the pH of 1 x M NaOH aqueous solution? (A)4(B)7 (C)10 (D)12 (E)14

8. What is the percent dissociation of 0.5 M acetic acid at 25°C ?(at 25°C acetic acid Ka=) (A)0.2% (B)0.4% (C)0.6% (D)0.8% (E)1.0%

9. At 25°C, which of the following substance has an standard enthalpy of formation equal to zero ? (A)O₂(g) (B)H₂O(g) (C)CH₄(g) (D)CI(g) (E)CO(g)

12. An aqueous solution is prepared by adding 50.0 mL of 0.050 M HBr aqueous solution to 150.0 mL of 0.10 M HI aqueou us solution. Calculate the of this aqucous solution(M)? (HBr and HI are both considered strong acids) (A)0.022 (B)0.044 (C)0.066 (D)0.088 (E) 0.11

13. Ascorbic acid, or vitamin C (C₆H₈O₆), is an essential vitamin. If a typical tablet contains 500.0 mg vitamin C, what amount (moles) of v ntained in 5 tablets? (A) (B)(C) (D) (E)0.14

14. At temperature 1000 K, equilibrium constant Kp=0.25 for the reaction What is the value of equilibrium constant K(Ke) at this temperature? (A)10.3(B)20.5 (C)30.1 (D)40.1 (E)50.2

15. A buffered solution is made by adding 40.1 g NH₄CI to 1.00 L of a 0.75 M solution of NH₃, Calculate the pH of the final solution. (Assume no volume change.) ((A)8.25 (B)9.25 (C)10.25 (D)11.25(E)12.25

19. Which of the following would you expect to have the lowest v vapor pressure at 25°C? (A)CH₃OCH₃  (B)CH₃CH₂OH (C)CH₃CH₂CH₃(D)CH₃CH₂CH₂CH₃(E)H₂O

21. The reaction
2A+B→C
has the following proposed mechanism.
step 1: A+B⇌D (fast equilibrium)
step 2:D+B→E
step 3:E+A→C+B
 If step 2 is the rate-determining step, what should be the rate of formation of C? (A)k[A](B)k[A]²[B](C)k[A][B]² (D)k[A][B](E)k[A]²[B]²

22. Which of the following is diamagnetic? (A)N₂ (B) (C)O₂ (D) (E)

23. Which of the following statements is true? (A) a triple bond is composed of two a bonds and one x bond. (B)σ bonds result from the head-to-head overlap of atomic orbitals. (C) Free rotation may occur about a double bond. (D) x bonds have electron density on the internuclear axis. (E) the Lewis structure for C₂H₂ shows single bonds and one double bond.

26. How many resonance structures does the have? (A)0 (B)1 (C)2 (D)3 (E)4

28. For any operating concentration cell, which of the following statements is true? (A)E and E°must both be positive. (B)E must be zero and E°must be positive (C)E° must be zero and E must be positive. (D)E and E° must both be negative. (E)E° must be positive and E must be negative.

29. For any galvanic cell to operate, which of the following statements is true? (A)△G° and E° must both be positive. (B)△G° must be negative and E° must be positive. (C)△G° and E' must both be negative. (D)△G° must be positive and E° must be negative. (E)△G° must be zero and E° must be negative.

30. In which case must a reaction be spontaneous at all temperatures? (A)△H is positive, and △S is positive. (B)△H is negative. and △S is negative. (C)△H is positive, and △S is negative. (D)△H is negative, and △S is positive. (E)△H = 0, and △S = 0.

31. Which is the percent dissociation of HF in a solution containing both 1.0 M HF and 1.0 M NaF ? (A)0.072%(B)0.27% (C)0.72% (D)2.7%(E)7.2%

33. Consider a solution madc by mixing 500.0 mL of 4.0 M NH₃ and 500.0 mL of 0.20 M

 Which is the concentration of Ag at equilibrium ? (A)0.4M (B)0.20M (C)0.10M(D) (E)

34. Calculate the of a 1.0 M H₂SO₄ aqucous solution? (A)2.024M (B)2.0M (C)1.24M (D)1.012 M. (E)M

35. At 25°C. the equilibrium constant for A + 2B⇌3C is 1.0 x . Which is the equilibrium constant for 6C⇌2A+ 4B at same temperature? (A) (B) (C) (D)(E)

39. What is the general formula for superoxides? (A)MO (B)M₂O₂(C)M₂O (D)M₂O₃(E)MO₂