January 2017 Chemistry Regents #41-45

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Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Question 51-53 Questions 54-55
 Questions 56-57 Questions 58-59 Questions 60-61 Questions 62-65  Questions 66-68  Questions 69-72  Questions 73-77 Questions 78-79 Questions 80-82 Questions 83-85  

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41 Which temperature represents the highest average kinetic energy of the particles in a sample of matter?

(1) 298 K (3) 27°C

(2) 267 K (4) 12°C

3 highest average kinetic energy

highest temperature

42 Which change in the H+ ion concentration of an aqueous solution represents a decrease of one unit on the pH scale?

(1) a tenfold increase

(2) a tenfold decrease

(3) a hundredfold increase

(4) a hundredfold decrease

1 a 1 pH change is a 10 x increase in H+
2 need 3 different units in the picture

 

44 Given the equation representing a system at equilibrium:

Which statement describes this system?

 (1) The concentration of PCl5(g) is increasing.

(2) The concentration of PCl5(g) is decreasing.

3) The concentrations of PCl5(g) and PCl3(g) are equal.

(4) The concentrations of PCl5(g) and PCl3(g) are constant.

4 Equilibrium...Con Con Requal

Concentrations are constant and the rates are equal

45 Given the formula representing a compound:

What is the IUPAC name of this compound?

(1) 2-chloroheptane (2) 6-chloroheptane

(3) 2,2-dichloroheptane (4) 6,6-dichloroheptane

3 Start counting from the right

 

Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Question 51-53 Questions 54-55
 Questions 56-57 Questions 58-59 Questions 60-61 Questions 62-65  Questions 66-68  Questions 69-72  Questions 73-77 Questions 78-79 Questions 80-82 Questions 83-85  

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