資訊推薦

• 2. Compound X2Y is 60% X by mass. Calculate the percent Y by mass of the compound X2Y2. (A) 30% (B)
• 19. The reaction 2 NO(g) + O2(g) → 2 NO2(g) is believed to take place bythe following mechanism:(1)
• 3. The following unbalanced reaction occurs in basic media:Fe2+ + Cr2O72- → Fe3+ + Cr3+The coefficie
• 4. How is the observed pressure of a gas related to the ideal pressure? (A) The relationship depends
• 5. For the reaction 2H2(g) + O2(g) ⇌ 2H2O(g), what is the relationship between K and Kp at temperatu
• 20. Consider the reaction 3A+B+CD + E, where the rate law is defined as-d[A]dt =(1.66x102 L³\/mol³
• 21. How many unpaired electrons are found in [CoCl6]3- (weak field)? (A) 0 (B) 1 (C) 2 (D) 4
• 6. The acids HC2H3O2 and HF are both weak, but HF is a stronger acid than HC2H3O2. HCl is a strong a
• 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