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108 年 - 108 台灣聯合大學系統學士班轉學考試題:普通化學#99851 

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1.

1.For the reaction of sodium bromide with chlorine gas to form sodium chloride and bromine, the appropriate half-reactions are (ox = oxidation and re = reduction):
(A) 60f7cc6848a65.jpg
(B) 60f7cc70d0dd8.jpg
(C) 60f7cc79dbf8f.jpg
(D) 60f7cc84d8066.jpg
(E) 60f7cc8ca95d9.jpg



2.

2. The following reactions:
   60f7ceee8bb33.jpg
are examples of
(A) acid-base reactions.
(B) unbalanced reactions.
(C) precipitation, acid-base, and redox reactions, respectively.
(D) redox, acid-base, and precipitation reactions, respectively.
(E) precipitation, redox, and acid-base reactions, respectively.



3.3.What volume of 18.0 M sulfuric acid must be used to prepare 15.5 L of 0.195 M H2SO4 ?
(A) 168 mL
(B) 0.336 L
(C) 92.3 mL
(D) 226 mL
(E) none of these


4.

4. Air has an average molar mass of 29.0 g/ mol. The density of air at 1.00 atm and 30°C is
(A) 29.0g/L
(B) 40.0g/mL
(C) 1.17g/L
(D) 1.29g/L
(E) 12g/L



5.

5. Consider the following gas samples:
60f7cf5720d48.jpg
Which one of the following statements is false?
(A) The volume of sample A is twice the volume of sample B.
(B) The average kinetic energy of the molecules in sample A is twice the average kinetic energy of the molecules in sample B.
(C) The fraction of molecules in sample A having a kinetic energy greater than some high fixed value is larger than the fraction of molecules in sample B having kinetic energies greater than that same high fixed value.
(D) The mean square velocity of molecules in sample A is twice as large as the mean square velocity of molecules in sample B.
(E) Assumning identical intermolecular forces in the two samples, sample A should be more nearly ideal than sample B.



6.

6.Consider the following ground state electron configuration: 1s22s22p4. Which of the ions has this ground state electron configuration?
(A) 60f7cfc2a8f97.jpg
(B) 60f7cfc8b8045.jpg
(C) 60f7cfceec710.jpg
(D) 60f7cfd69f35a.jpg



7.

7. Which ionization process requires the most energy?
(A) 60f7d05848d74.jpg
(B) 60f7d0607415b.jpg
(C) 60f7d0693fb62.jpg
(D) 60f7d06fa4cbb.jpg



8.8. Which type of spherical packing has the most unused space?
(A) body-centered cubic
(B) cubic closest-packed
(C) cubic closest-packed and hexagonal closest-packed
(D) simple cubic


9.9. What is the edge length of a face-centered cubic unit cell made up of atoms having a radius of 200 pm?
(A) 71 pm
(B) 566 pm
(C) 20 pm
(D) 110 pm


10.

10.KBr crystallizes in a cubic unit cell with Br ions on each corner and each face. How many 60f7d09a25069.jpg ions and 60f7d0ae8944e.jpg ions are in each unit cell of KBr?
(A) 1 60f7d0bdac983.jpg ion and 1 60f7d0ca428dd.jpg ion
(B) 2 60f7d0d301944.jpg ions and 2 60f7d0d9092b2.jpg ions
(C) 4 60f7d0e18d4b6.jpg ions and 4 60f7d0e86f210.jpg ions
(D) 8 60f7d0f233134.jpg ions and 8 60f7d0f8d8509.jpg ions



11.

11.Which should be least soluble in water?
(A) 60f7d14db867d.jpg
(B) 60f7d15b016c1.jpg
(C) 60f7d169b53bb.jpg
(D) 60f7d1790cefa.jpg



12.12.A solution is prepared by dissolving 17.75 g sulfuric acid, H2SO4, in enough water to make 100.0 mL of solution. If the density of the solution is 1.1094 g/mL, what is the molality?
(A) 0.1775m H2SO4
(B) 0.1810 m H2SO4 
(C) 1.810 m H2SO4 
(D) 1.940 m H2SO4


13.13.n general, as the temperature increases, the solubility of gases in water ______ and the solubility of most solids in water ______.
(A) decreases, decreases
(B) decreases, increases
(C) increases, decreases
(D) increases, increases


14.

14.A solution is prepared by dissolving 20.0 g of sucrose, 60f7d1e7afbcd.jpg in 250. g of water at 25°C. What is the vapor pressure of the solution if the vapor pressure of water at 25°C is 23.76 mm Hg?
(A) 0.198 mm Hg
(B) 20.5 mm Hg
(C) 23.7 mm Hg
(D) 24.0 mm Hg



15.

15.Assuming that sea water is a 3.5 wt % solution of NaCl in water, calculate its osmotic pressure at 20°C. The density of a 3.5% NaCl solution at 20°C is 1.023 g/mL.
(A) 1.0 atm
(B) 15 atm
(C) 29 atm
(D) 100 atm



16.

16.A solution of a nonelectrolyte solution contains 30.0 g of solute dissolved in 250.0g of water. The freezing point of the water is observed to be -2.50°C. The Kf for water is 1.86 °C/m and normal freezing point of water is 0.00'C. What is the molar mass of the substance?
(A) 335 g/mol
(B) 89.5 g/mol
(C) 895 g/mol
(D) 33.5 g/mol



17.

[17.-18].Arrows in the energy diagram below represent enthalpy changes occurring in the exothermic formation of a solution:
60f7d29e8f439.jpg


【題組】

17.Which arrow represents 60f7d2bb9f9cc.jpg?
(A) arrow (a)
(B) arrow (b)
(C) arrow (c)
(D) arrow (d)



18.【題組】

18.Which arrow represents 60f7d2dd5f053.jpg?
(A) arrow (a)
(B) arrow (b)
(C) arrow (c)
(D) arrow (d)



19.

19. The following diagram shows a close-up view of the vapor pressure curves for a pure solvent and a solution containing a nonvolatile solute dissolved in this solvent.
60f7d3d9af1bc.jpg
 Which curve is the solvent and what happens to the vapor pressure when the solute is dissolved in the solvent?
(A) Curve (a) is the solvent and the vapor pressure decreases.
(B) Curve (a) is the solvent and the vapor pressure increases.
(C) Curve (b) is the solvent and the vapor pressure decreases.
(D) Curve (b) is the solvent and the vapor pressure increases.



20.20. What is the mole fraction of oxygen in a gas mixture that is 27% oxygen and 73% nitrogen by volume?
(A) 0.24
(B)0.27
(C) 0.32
(D)0.37


21.

21.A concentration-time study of the gas phase reaction 2 A3 - 3 A2 produced the data in the table below.
60f7d41d11568.jpg
 What is the concentration of A2 after 30 seconds?
(A) 5.00 x 10*M
(B) 5.25 x 10*M
(C) 5.50 x 10*M
(D) 6.00 x 10*M



22.

22.The following set of data was obtained by the method of initial rates for the reaction:
60f7d449d09a9.jpg

(A) 60f7d469ddca7.jpg
(B) 60f7d470ace3f.jpg
(C) 60f7d477ee044.jpg
(D) 60f7d480a63fa.jpg



23.

23.Shown is a concentration versus time plot for a reaction involving gases A, B, and C.
60f7d49abcc66.jpg
Which equation best represents the reaction?
(A) 4A(g) - B(g) +2C(g)
(B) 4A(g) +B(g) -2C(g)
(C) 2C(g) →4A(g)+B(g)
(D) 2C(g) +B(g)→4A(g)



24.

24.Consider a reaction that occurs by the following one-step mechanism: A2+ B2→ 2 AB The potential energy profile for this reaction is shown below.
60f7d4bdca53c.jpg
 What is the species present at reaction stage 1?
(A) an intermediate
(B) a product
(C) a reactant
(D) a transition state



25.

25. The following set of data was obtained by the method of initial rates for the reaction:
   60f7d4ecd1048.jpg
What is the rate law for the reaction?
60f7d501d041c.jpg
(A) 60f7d52c57190.jpg
(B) 60f7d533ec0e4.jpg
(C) 60f7d53cb1ca2.jpg
(D) 60f7d54670a3f.jpg



26.

26.For a particular first-order reaction, it takes 48 minutes for the concentration of the reactant to decrease to 25% of its initial value. What is the value for rate constant 60f7d5622568d.jpg for the reaction?
(A) 60f7d58184bbc.jpg
(B) 60f7d5883b214.jpg
(C) 60f7d59167137.jpg
(D) 60f7d597efbe4.jpg



27.

27.The reaction: 2 HI→ H2 + I2, is second order and the rate constant at 800 K is 60f7d870f031c.jpg 60f7d8791f2a8.jpg. How long will it take for 8.00 x 60f7d88e0635a.jpg mol/L of HI to decrease to one-fourth of its initial concentration?
(A) 0.619s
(B) 124 s
(C) 387s
(D) 429 s



28.

28.What are the coefficients in front of 60f7d8ad14d0d.jpg and Cu(s) when the following redox equation is balanced in an acidic solution:
60f7d8c4886ac.jpg
(A) 2, 3
(B) 2,6
(C) 3,4
(D) 3,6



29.

29.Determine the number of water molecules necessary to balance the following chemical equation.
60f7d8ec78bbd.jpg
(A) 3
(B) 5
(C) 7
(D) 14



30.

30.The iron content of foods can be determined by dissolving them in acid (forming 60f7d9093f130.jpg), reducing the iron(II) to iron(I), and titrating with cerium(IV):
60f7d92d7d145.jpg
 Identify the two half-reactions in the above reaction.
(A) 60f7d970c9079.jpg
(B) 60f7d9783814e.jpg
(C) 60f7d97fa8836.jpg
(D) 60f7d98686b7a.jpg



31.

31.For the hypothetical reaction 60f7d9a545a01.jpg. For this reaction, if the value of x is 4, then the value of y =_________.
(A)1
(B)2
(C)3
(D)4



32.

32. 60f7d9de715df.jpg
 Which of the following reactions should be spontaneous under standard conditions?
60f7d9ee0adca.jpg
(A) I and II are both nonsponta
(B) I is nonspontaneous and I is spontaneous.
(C) I is spontaneous and II is nonspontaneous.
(D) I and II are both spontaneous.



33.

33.At a certain temperature, Kc equals 1.4 x 102 for the reaction:
2CO(g)+O2(g)⇌2 CO2(g)
 If a 2.50-L flask contains 0.400 mol of CO2 and 0.100 mol of O2 at equilibrium, how many moles of CO are also present in the flask?
(A) 0.422 mol
(B) 0.169 mol
(C) 0.107 mol
(D) 0.0114mol



34.

34.The following pictures represent aqueous solutions of binary acids of the type HA where the water molecules have been omitted for clarity.
60f7da9c8eb90.jpg
Determine the strongest acid of the set.
(A)A
(B)B
(C)C
(D)D



35.

35.What is the second stepwise equilibrium constant expression for phosphoric acid H3PO4?
(A) 60f7dae896cfa.jpg
(B) 60f7daf0ca7de.jpg
(C) 60f7daf884fd9.jpg
(D) 60f7db00150c9.jpg



36.

36.Sodium reacts violently with water according to the equation:
2 Na(s) + 2 H2O(l)→ 2 NaOH(aq) +H2(g)
The resulting solution has a higher temperature than the water prior to the addition of sodium. What are the signs of △H° and △S° for this reaction?
(A) △H° is negative and △S° is negative.
(B) △H° is negative and △S° is positive.
(C) △H° is positive and △S° is negative.
(D) △H° is positive and △S° is positive. 



37.

37.For the process
60f7db82025df.jpg
 Assuming that the surroundings can be considered a large heat reservoir at 25°C, calculate 60f7dbaea8200.jpg for the process at 25°C and 1 atm pressure. Is the process spontaneous at 25°C and 1 atm pressure?
(A) 60f7dbf192496.jpg
(B) 60f7dbfc7fbd0.jpg
(C) 60f7dc09d5210.jpg
(D) 60f7dc13e18e2.jpg



38.

38. In the following reaction the unshaded spheres represent H atoms.
60f7dc2c3f4db.jpg
 Identify the BrΦnsted-Lowry acid/base conjugate pairs.
(A)(1)/(2) and (3)/(4)
(B) (1)/(3) and (2)/(4)
(C) (I)/(4) and(2)/(3)
(D) none of the above.



39.

39.An experiment with 60f7dc663f189.jpg takes 47.5 hours. At the end of the experiment, 1.90 ng of 60f7dc70b13c5.jpg remains. If the half life is 180 hours, how many ng of 60f7dc7993cf4.jpg were originally present?
(A) 2.47 ng
(B) 3.05 ng
(C) 3.28ng
(D)11.8 ng



40.

40.The functional groups in the molecule below are
60f7dc92685aa.jpg
(A) alkane, aldehyde, and ester.
(B) alkane, aldehyde, ketone, and ether.
(C) alkane, carboxylic acid, and ester.
(D) alkane, ketone, and ester.



懸賞詳解

國三地理上第一次

3.( )由中亞地區的地理環境推斷,此區主要河川與湖泊的類型應分別為下列何者? (A)內流河、淡水湖 (B)內流河、 鹹水湖 (C)外流河、鹹水湖 (D)外流河、...

50 x

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108 年 - 108 台灣聯合大學系統學士班轉學考試題:普通化學#99851-阿摩線上測驗

108 年 - 108 台灣聯合大學系統學士班轉學考試題:普通化學#99851