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109年 - 109 國立高雄大學_碩士班招生考試_應用化學系：普通化學#103029
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(2) Find the solubility of Cr(OH)3 in a buffer of pH 13.0
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相關申論題
＜ II ＞計算題 (1) A sample of commercial concentrated hydrochloric acid is 36.2% HCl by mass and has a density of 1.190 g/mL. Calculate the molarity (M) of HCl. ( = 36.46 g/mol)
#434744
(3) Aluminum (Al) reacts with sulfur (S) to form solid aluminum sulfide (Al2S3), as the following equation (unbalanced)； What is the percent yield of aluminum sulfide if 18.5 g of aluminum sulfide is collected when 10.0 g of aluminum reacts with 15.0 g of sulfur.
#434746
(4) At a given temperature, you have a mixture of benzene (vapor pressure of pure benzene = 745 torr) and toluene (vapor pressure of pure toluene = 290 torr). The mole fraction of toluene in the solution is 0.420. Assuming ideal behavior, calculate the mole fraction of benzene in the vapor above the solution.
#434747
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
2. Given the following equation: (A) What is the oxidizing agent? (B) What element is reduced? (C) Balance the reduction half reaction in acidic solution. (D) Balance the oxidation half reaction in acidic solution. (E) Balance the overall reaction in basic solution.
#550835
1. 25.0 kilograms of nitrogen gas and 5.00 kilograms of hydrogen gas are mixed and reacted to form ammonia. (A) Write and balance the reaction. (B) Which one is the limiting reagent? (C) How many grams of ammonia will form? (D) How many grams of excess reagent remain?
#550834
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