所屬科目：研究所、轉學考(插大)◆普通化學
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?
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.
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
4.Consider the galvanic cell based on the following half-reactions, determine the overall cell reaction and calculate E°.
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.
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.
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.
阿摩線上測驗
登入
阿摩線上測驗
登入
(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.
(C) SO3 (D) XeO3
, 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.
, 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.
(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.