所屬科目:研究所、轉學考(插大)◆普通化學
4. Balance the reaction, , which occurs in basic solution. For the balanced equation, the sum of the coefficients of and H2O is (A)5 (B) 10 (C) 15 (D) 20
5. The mean free path for an oxygen molecule in a sample of pure oxygen gas (diameter = 300 pm) at 35°C and 1.7 atm is (A)(B) (C) 1.6×108 (D) 1.6×109 m.
7. For the reaction 2H2(g) + O2(g)⇌ 2H2O(g), what is the relationship between K and Kp at temperature T? (A) Kp = K(RT)2 (B) K = Kp(RT) (C) K = Kp (D) Kp = K(RT) (E) K = Kp(RT)2
8. An endothermic reaction, 2A(aq)⇌ 2B(aq) + C(aq), is in equilibrium. Lowering the temperature of the system will (A) have no effect. (B) cause [A] to increase. (C) cause [B] to increase. (D) cannot be determined.
9. A 5.0 M H3PO4 solution, . [H+] is (A) 5.0 (B) 0.19 (C) 0.038 (D) M.
10. The value of question 9 is (A) 0.038 (B) (C) (D)M.
11. A buffer solution contains 0.5 M acetic acid and 0.5 M sodium acetate. [H+] of the solution is (A) (B) (C) (D)M.
12. One mole of an ideal gas at 25°C is expanded isothermally and reversibly from 125.0 L to 250.0 L. Which statement is correct? (A) (B) = Rln2 (C) = 0 (D) = 0
15. Which metal, Al or Ni, could reduce to Zn(s) if placed in a solution? (A) Ni (B) Al (C) Both Al and Ni would work. (D) Neither Al nor Ni would work.
16. Determine the equilibrium constant at 25°C for the reaction (A) (B) 4.1 × 103 (C) 9.3 × 108 (D)
17. Light has a wavelength of 560 nm. What is the energy of a photon of this light? (A) (B)(C) (D) (E)J.
19. Which molecule or ion violates the octet rule? (A) (B) PF3 (C) H2O (D)
21. Specify the hybridization of the nitrogen atom in each of the following, in order. (A) sp2, sp, sp2 (B) sp3, sp, sp (C) sp2, sp, sp3 (D) sp3, sp2, sp3
25. The A, B, and C area of the following phase diagram represent phases of (A) solid, liquid, gas (B) solid, gas, liquid (C) gas, liquid, solid (D) gas, solid, liquid.
27. How many unpaired electrons are found in (weak field)? (A) 0 (B) 1 (C) 2 (D) 3 (E) 4
29. Consider the polymer drawn below: What monomer is needed to produce the above polymer? (A) CH3CH = CHCH3 (B) CH2 = CH2 and CH3CH = CH2 (C) CH2 = CH2 and CH3CH = CHCH3 (D) CH2 = C(CH3)2
1. Consider 2.00 moles of an ideal monoatomic gas that is taken from state A ( = 2.00 atm, = 10.0 L) to State B (= 2.00 atm, VB= 30.0 L). (A) Calculate q, w, △E, and △H of the process. ( B ) Two of the four quantities are state functions, what are they? (6%)