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114年 - 114 國立臺灣大學_ 碩士班招生考試試題︰普通化學#125982
> 申論題
11. Label the functional group(s) present in the following molecule in English :
相關申論題
12. Phenol (C6H5OH) and n-hexanol are both alcohols. However, phenol is much more acidic than hexanol. Explain.
#535108
13.Combustion analysis of 20.00 mg of an unknown compound containing only C, H, and O gives 49.23 mg CO2 and 12.96 mg H2O. The compound has a molecular mass of 250.3 g/mol. What is the probable molecular formula of the compound?
#535109
14. Ascorbic acid (H2C6H6O6) is a diprotic acid with and (A) What is the pH of a solution of 350.0 mg ascorbic acid in 500.0 mL water? Show your calculations. (5 pts) (B) Suppose 150.0 mL of 0.01000 M NaOH (aq) was added to the solution from (A). What would the pH of the resulting solution be? Show your calculations.
#535110
15. Radium-226 is a radioactive isotope that decays to form Radon-222 and an alpha particl(E) This process follows first-order kinetics, and the half-life of Radium-226 is 1600 years. Given a sample of 5.00 g of Radium-226, how many moles of Radon-222 would be present in the sample after two years?
#535111
16. A galvanic cell is made based on the following reaction: With relevant half reactions: If = 0.10 M, = 0.10 M, = 1.00 M, and Ecell = 3.02 V at 298 K, what is the pH of the cathode compartment?
#535112
7. Draw all the geometrical isomers of (en = ethylenediamine). Which of these isomers also has an optical isomer? Please draw clearly to receive full credit. Circle the one that has an optical isomer and draw the optical isomer also.
#550840
6. For O2, , and , draw the molecular orbital (MO) diagram, fill in the electrons, and calculate the bond order for each. Which one has the strongest bond? Please draw clearly to receive full credit. For your convenience, you can draw only one MO diagram, but you must clearly indicate the electrons for each molecule and ions.
#550839
5.The heat combustion of acetylene, , at 25°C, is -1299 kJ/mol. At this temperature, the enthalpy of formation for and are -393 and -286 kJ/mol, respectively. Calculate for acetylene.
#550838
4.Consider the galvanic cell based on the following half-reactions, determine the overall cell reaction and calculate E°.
#550837
3. Draw the most stable Lewis structure (with the formal charge of each atoms minimized) for the following molecules or ions. Please also indicate the shape of the molecules or the ions. (A) O2 (B) (C) SO3 (D) XeO3
#550836
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