2. A 0.307 g sample of an unknown triprotic acid is titrated to the third equivalence point using 35
3. The partial pressures of CH4, N2, and O2 in a sample of gas were found to be 135 mm-Hg, 508 mm-Hg
4. A 32.5 g piece of aluminum (which has a molar heat capacity of 24.03 J/°C·mol) is heated to 82.4°
5. Which of the following statements is (are) true? I. An excited atom can return to its ground stat
6. Consider the following reaction:A2 + B2 2AB ∆H = -365 kJThe bond energy for A2 is half the amou
7. Consider the molecular orbital energy level diagrams for O2 and NO. Which of the following is tru
8 If equal, rigid spheres are arranged in a simple cubic lattice in the usual way (i.e., in such a w
10. A 1 L container originally holds 0.4 mol of N2, 0.1 mol of O2, and 0.08 mole of NO. If the volum
11. In titrating 0.20 M hydrochloric acid, HCl, with 0.20 M NaOH at 25°C, the solution at the equiva
13. A mixture of hydrogen and chlorine remains unreacted until it is exposed to ultraviolet light fr
15. Give the number of geometrical isomers for the octahedral compound [MA2B2C2], where A, B, and Cr
3. 汽車油箱有 22.8 kg 的汽油，當汽油完全燃燒時消耗 O2，並產生CO2及H2O。假如以辛烷代表汽油的成分，產生的CO2及H2O總和為多少 kg？ (A) 51.8 (B) 102.8 (C
4. 在 25.0℃時，具可自由移動活塞的密閉容器內裝有 3.00 L 氣體，定壓下將溫度加熱到 145℃，則氣體的最終體積為何？ (A) 1.82 L (B) 3.58 L (C) 4.21 L (