41. 如果反應 A → products 為二級反應,當反應 20 秒後,A 的濃度減少 10 %,請問當 A 的濃度減少 90 %時,約需要多久時間?(A) 180 s (B) 440 s (C)
43. 2HI → H2 + I2 的反應為二級反應,若將反應物濃度與時間的作圖,何者為線性關係?(A) 1/[HI]與反應時間關係圖 (B) log[HI]與反應時間關係圖(C) [HI]與反應時間
44. 蔗糖在酸中分解成果糖及葡萄糖,如果以 ln[蔗糖]對時間作圖得到一條直線,斜率為–0.208 hr–1。一蔗糖溶液的起始濃度為 0.200 M,當蔗糖的濃度變為 0.050 M 需多久時間?(
45. 請問以下何種作法會使密閉容器中之氣體的方均根速率(root-mean-square speed)由 345 m/s 上升至 690 m/s?(A) 加熱該氣體使其絕對溫度上升為原來的 2 倍(
47. 氦氣(原子量為 4.0 g/mol)在溫度為多少時,其分子的方均根速率與 300 K 時氧氣(分子量為 32.0 g/mol)分子的方均根速率相同?(A) 37.5 K (B) 75 K (C
48. 若固體銅其單位晶格的排列方式為面心立方堆積,以下敘述何者錯誤?(A) 每單位晶格中有兩個原子(B) 每一個銅原子周遭圍繞著 12 個銅原子(C) 面心立方堆積又稱為立方最密堆積(cubic c
49. Ⅰ. 偶極-偶極力(dipole-dipole force);Ⅱ. 倫敦分散力(London dispersion force);Ⅲ. 離子鍵 (ionic bonding);Ⅳ. 氫鍵(hy
5Iron objects such as storage tanks and underground pipelines can be protected from corrosion by con
7. Which of the following reactions is associated with the most positive change in entropy?(A)C(s, g
8. A 0.1 L solution is made by dissolving 0.550g of CaCl2 (Mw: 110) in water, and completely dissoci
9. A mixture of 8.00g of O2(g) and 8.00 g of CH4(g) is placed in a 15.0L vessel at 27 oC, what is th
10. Which connection is correct (a) the first ionization energy of oxygen, (b) the second ionization
11. The energy difference between staggered and eclipsed conformations of ethane is 12.0 kJ/mol, pro
13. For which of the following reaction does K= Kp at 100 ℃?(A) N2(g)+3H2(g) -> 2NH3(g) (B) CO(g)+H2
14. [18F]FDG (2-deoxy-2-[18F]fluoroglucose)is used for PET imaging , it decays by_______ and[18F] wi
15. Below structure is the precursor of the Remdesivir, an anti-viral drug. Which statements are tru
2. Which of the following substances will form basic solutions in an aqueous solution? NH4Cl, Cu(NO3