67. Based on the molecular orbital theory, which of the following molecules has the strongest bond?(
50. Assign R or S configuration in the following molecules. (A)A=R；B=S (B)A=S；B=S (C)A=S；B=R (D)A=R；
68. Which of the following molecules has the smallest bond angle?(A) CH4 (B) SiH4 (C) NH3 (D) H2O (E
69. Which of the following statements is false?(A) The layering in a hexagonal closest-packed struct
70. Rank the following compounds in the order from the highest boiling point to the lowest boilingpo
71. The reaction “A + 2B → 2 C” exhibits the rate law as following: Rate = k [A][B] 2Which of the fo
72. Consider the following reaction: (A) a. No shift； b. shift to left； c. shift to right(B) a. No s
73. Consider the following reaction at equilibrium. Which change will cause the equilibrium to shift
74. How many of the following will raise the pH of a weak acid HA in aqueous solution?I. Addition of
76. Consider a galvanic cell based on the following reactions: What is the value of ∆Go?(A) -84 kJ (
77. What type of radioactive process would be expected in the following reaction? (A) α particle pro