資訊推薦

• 10. Calculate the pH of the solution in Problem 9 after adding 50.0 mL (total) KOH. (A) 4.5 (B)
• 11. Calculate the bond energy of F2- (in kJ\/mol) by using the following data: ionization energy of
• 12. Arrange the following species in order of the shortest to the longest N-O bond:(1)H2NOH, (2)N2O,
• 13. A certain substance, X, has a triple-point temperature of 20°C at a pressure of 2.0 atm. Which o
• 14. The temperature at some planet is so high that the electronic ground state of the hydrogen atom
• 15. Arrange the elements C, N, and O in order of increasing ionization energy. (A) C, N, O (B)
• 16. 1.0 mole monatomic ideal gas at 300 K and 10.0 atm is expanded adiabatically and reversibly to 1
• 17. What's the work (in R) in Problem 16? (A) -210 (B) -270 (C) -360 (D) -320 (E) -440
• 18. A certain reaction has the following general form: a A → bB.At a particular temperature and [A]o
• 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