資訊推薦

• 22. What is the correct systematic name for the molecule 2-ethyl-4-tertiary-butylpentane? (A) 2-
• 7. Consider a solution consisting of the following two buffer systems:H2CO3 ⇌ HCO3- + H+ pKa = 6.4H2
• 23. Which of the following types of compounds lacks a sp²-hybridized carbon center? (A) aldehyde
• 8. Which statement is true of a process in which 1 mol of a gas is expanded from state A to state B?
• 24. How many isomers of an alcohol (formula C4H10O) can be oxidized to acid? (A) 1 (B) 2 (C) 3
• 1. Given that Ag+(aq) + 2NH3(aq)⇌ Ag(NH3)2+(aq) (Keq=1.6 x107) calculate [Cl-]cq (in M) when the sol
• 2. Given that pure liquid A has vapor pressure x, and pure liquid B has vapor pressure y, with x ＞ y
• 3. Consider the galvanic cell based on the following half-reactions:Zn+2+2 e-→ Zn, E°= -0.76 V； Fe+2
• 9. Consider the dissociation reaction of the acidHF.HF(aq) ⇌ H+(aq) + F-(aq)Why is ΔS negative? (A)
• 10. In which of the following cases can Eº be equal to zero?I. In any cell at equilibrium II. In a c
• 4. Consider the following equilibrium: N2(g) + 3H2(g)⇌2NH3(g)with Keq = 2.0x10-6. Assuming that 1.00
• 11. For a reaction in a voltaic cell, both ΔHº and ΔSº are positive. Which of the following statemen
• 12. Which of the following is not determined by the principal quantum number, n, of the electron in
• 13. Which of the following ionic compounds has the largest lattice energy； that is, which has the la
• 14. Which of the following has a central atom that is dsp3 hybridized? (A) SO2 (B) SBr6 (C) CF4 (D)
• 5. What's the equilibrium concentration (in 10-3 M) of NH3 in Problem 4? (A) 5.2 (B) 3.3
• 15. The spectrochemical series is I- ＜ Br- ＜ Cl- ＜ F- ＜ OH- ＜ H2O ＜ NH3 ＜ en ＜ NO2- ＜ CN- Which of t
• 6. Calculate the △Ssys (in R) for 1.0 mole of monatomic (單原子) ideal gas changingfrom state A (1.0 at
• 7. Calculate △G (in kJ) at 300 K for the reaction CO(g) + 2 H2(g) → CH3OH(l)，in which pco = 2.23 atm
• 2. The percentage of the ionic character of H-Cl bond is 18.2%. The bond length is 1.27 x10-8 cm. Wh
• 3. For how many of the following species (B2-, C2, N2-, O2-, and F2) does the bond order decrease if
• 4. Rank the following bonds in order from less polar to most polar: (1)P-S, (2)Ca-S, (3)K-Cl, (4)Si-
• 5. How many of the following molecules or ions (IO2F2-, TeF4, ICl3, XeF4, ClO4-, SOF4) have see-saw
• 6. How many molecules or ions listed in Problem 5 have a hybridization of dsp³ on the central atom?
• 7. How many of the followings (CN-, NO-, O2, OF⁺, OF-) are paramagnetic? (A)1 (B)2 (C)3 (D)4