課程名稱︰普通化學丙
課程性質︰必帶
課程教師︰劉銘璋
開課系所︰藥學 醫技 護理 職治 物治 公衛
考試日期（年月日）︰10/17/2012
考試時限（分鐘）：第3、第4節
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題 :
Midterm Exam of General Chemistry 10/17/2012
1. Which of these properties are intensive and which are extensive?
(a)length, (b)color, (c)temparature, (d) density. (4%)
2. Write the numbers for these prefixes: (a)mega-, (b)centi-, (c)pico-
(d)micro-. (4%)
3. Carry out these operations as if they were calculations of experimental
results, and express each answer in the correct units and with the correct
number of significant figures: (a)7.310 km ÷ 5.70km, (b) (7.8 m
-0.34m)/(1.15 s + 0.82 s) (4%)
4.Name the following compounds: (a) FeHPO4, (b) (NH4)2SO3, (c) SO3, (d) BaCl2
‧2H2O, (e) C7H16. (10%)
5. Write the chemical formulas for the following compounds: (a) mercury (I)
iodide, (b) platinum (II) carbonate, (c) tetraphosphorus decasulfide, (d)
hydrobromic acid. (8%)
6. A simple of a compound contains 1.52g of nitrogen and 3.47 g of oxygen.
The molar mass of this compound is between 90 g and 95 g. Determine the
molecular formula and the accurate molar mass of the compound. (N: 14.01 amu,
O: 16.00 amu) (16%)
7. consider the reaction MnO2+4HCl 迳 MnCl2 + Cl2 + 2H2O
If 0.86 mole of MnO2 and 48.2 g of HCl react, which reagent will be used up
first? How many grams of Cl2 will be produced? (Mn: 54.94 amu, Cl: 35.45 amu)
(6%)
8. Hydrogen fluoride is used in the manufacture of Freons (which destroy
ozone in the stratosphere) and in the production of aluminum metal. It is
prepared by the reaction
CaF2 + H2SO4 迳 CaSO4 + 2HF
In one process 6.00 kg of CaF2 are treated with an excess of H2SO4 and yield
2.86 kg of HF.
Calculate the percent yield of HF. (Ca: 40.08 amu, F: 19.00 amu, S: 32.07
amu) (5%)
9. When light of frequency equal to 2.11 × 10^15 s^-1 shines on the surface
of gold metal, the kinetic energy of ejected electrons is found to be 5.83 ×
10^-19 J. What is the work function of gold? (h = 6.63 × 10^-34 J‧s) (6%)
10. An electron in the hydrogen atom makes a transition from an energy state
of principal quantum numbers ni to the n = 2 state. If the photon emitted has
a wavelength of 434 nm, what is the value of ni? (RH = 2.18 x 10^-18 J) (6%)
11. Explain shielding and penetrating effects. Using the boron atom as an
example, describe the effects on the energy of electrons in an atom. (6%)
12. indicate which of the following sets of quantum numbers in an atom are
unacceptable and explain why: (a) (1, 0, 1/2, 1/2), (b) (3, 0, 0, 1/2), (c)
(2, 2, 1, 1/2). (6%)
13. Write ground-state electron configurations for these ions and atoms: (a)
Na+ (Z=11), (b) Mg (Z=12), (c) Cl- (Z=17), (d) Cu (Z=29), (e) Cu2+ (Z=29).
Which of these species are paramagnetic? (7%)
14. (a) Define ionization energy. (b) Why is the second ionization energy
always greater than the first ionization energy for any element? (c) State
the group and period trends in the first ionization energy of the elements.
(d) What types of elements have the highest ionization energies and what
types the lowest ionization energies? (8%)
15. (a) Draw a rough sketch of a periodic table. (b) Name each group from 1A
to 8A. (c) Indicate where metals, nonmetals, and metalloids are located. (d)
What is Moseley’s contribution to the modern periodic table? (8%)
16. (a) Define electron affinity. (b) Why are the electron affinities of the
alkaline earth metals either negative or small positive values? (6%)
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