January 2018 Chemistry Regents #69-72

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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

Questions 51-54
 Questions 55-56 Questions 57-59 Questions 60-62 Questions 63-65  Questions 66  Questions 67-69  Questions 70-72 Questions 73-77 Questions 78-81 Questions 82-85  

 

 

 

 

 #69-72
  

A bubble of air at the bottom of a lake rises to the surface of the lake. Data for the air inside the bubble at the bottom of the lake and at the surface of the lake are listed in the table below.

 70 State the number of significant figures used to express the pressure at the surface of the lake. [1]

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4

71 Show a numerical setup for calculating the volume of the bubble at the bottom of the lake. [1]

HIGHLIGHT TO SEE THE ANSWER

(104*2.5*282)/(293*618.3)

72 Determine the mass of the air in the bubble at the surface of the lake. [1]

HIGHLIGHT TO SEE THE ANSWER

0.0030g
  

on to Questions 73-77

  

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

Questions 51-54
 Questions 55-56 Questions 57-59 Questions 60-62 Questions 63-65  Questions 66  Questions 67-69  Questions 70-72 Questions 73-77 Questions 78-81 Questions 82-85