January 2017 Chemistry Regents #54-55

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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  

 

 

 

 

 #54-55
  

The densities for two forms of carbon at room temperature are listed in the table below.

54 Compare the number of carbon atoms in a 0.30-cm3 sample of graphite and a 0.30-cm3 sample of diamond. [1]

HIGHLIGHT TO SEE THE ANSWER

there are more atoms in diamond

55 A student calculated the density of a sample of graphite to be 2.3 g/cm3. Show a numerical setup for calculating the student’s percent error for the density of graphite. [1]

HIGHLIGHT TO SEE THE ANSWER

((2.3-2.2)/2.2)*100%

 

  

on to Questions 56-57

  

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