January 2013 Chemistry Regents #41-50

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Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50

Questions 51 Questions 52-54 Questions 55-58 Questions 59-61 Questions 62-65 Questions 66-69

Questions 70-72 Questions 73-76 Questions 77-79 Questions 80-82 Questions 83-85

 

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41 Given the balanced equation representing a reaction:

Which type of reaction is represented by this equation?

(1) combustion

(2) decomposition

(3) saponification

(4) transmutation

4 Link Nuclear reactions with 2 reactants

artifical transmutation

42 A 220.0-mL sample of helium gas is in a cylinder with a movable piston at 105 kPa and 275 K. The piston is pushed in until the sample has a volume of 95.0 mL. The new temperature of the gas is 310. K. What is the new pressure of the sample?

(1) 5l.1 kPa

(2) 216 kPa

(3) 243 kPa

(4) 274 kPa

4 Link Use combined gas law

P1V1/T1=P2V2/T2

Plug in

 

43 Given the cooling curve of a substance:

During which intervals is potential energy decreasing and average kinetic energy remaining constant?

(1) AB and BC

(2) AB and CD

(3) DE and BC

(4) DE and EF

3 Link phase changes, plateaus, potential energy changes

 

 

44 Which metal will spontaneously react with Zn2+(aq), but will not spontaneously react with Mg2+(aq)?

(1) Mn(s)

(2) Cu(s)

(3) Ni(s)

(4) Ba(s)

1 Link Table J, above Zn but below Mg

45 Which particle diagram represents the arrangement of F2 molecules in a sample of fluorine at 95 K and standard pressure?

2 Link Use Table S to determine phase of F2 at 95K

Boiling point is 85K so it is a gas

also F2 is diatomic

46 Given the formulas of four organic compounds:

Which compounds have the same molecular formula?

(1) A and B

(2) A and C

(3) D and B

(4) D and C

2 Link count each atom

 

47 Given the incomplete equation representing a reaction:

What is the formula of the missing product?

(1) O2-     (3) OH-

(2) O2      (4) OH

3 Link find the missing atoms and make sure charge in equals charge out
48 Given the equation representing a reaction where the masses are expressed in atomic mass units:

Which phrase describes this reaction?

(1) a chemical reaction and mass being converted to energy

(2) a chemical reaction and energy being converted to mass

(3) a nuclear reaction and mass being converted to energy

(4) a nuclear reaction and energy being converted to mass

3 Link nuclear fusion mass converts to energy

 

E=mc2

 

49 Given the diagram representing a process being used to separate the colored dyes in food coloring:

Which process is represented by this diagram?

(1) chromatography   (3) distillation

(2) electrolysis           (4) titration

1 Link that's chromatography, you did it in bio or middle school
50 Given the diagram representing a reaction:

According to one acid-base theory, the water acts as

(1) a base because it accepts an H+     (3) an acid because it accepts an H+

(2) a base because it donates an H+     (4) an acid because it donates an H+

1 Link the water gains H+ and is therefore a base

Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50

Questions 51 Questions 52-54 Questions 55-58 Questions 59-61 Questions 62-65 Questions 66-69

Questions 70-72 Questions 73-76 Questions 77-79 Questions 80-82 Questions 83-85

 
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