June 2018  Chemistry Regents #36-40

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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

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36 What is the total number of neutrons in an atom of K-42?

(1) 19      (3) 23

(2) 20      (4) 42

   
37 Given the equation representing a reaction: 2C + 3H2 → C2H6 What is the number of moles of C that must completely react to produce 2.0 moles of C2H6?

(1) 1.0 mol      (3) 3.0 mol

(2) 2.0 mol      (4) 4.0 mol

   
38 Given the equation representing a reaction:

Mg(s) +  2HCl(aq) → MgCl2(aq) + H2(g)

Which type of chemical reaction is represented by the equation?

(1) synthesis

(2) decomposition

(3) single replacement

(4) double replacement

   

 

   
   

 

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 51-53 Questions 54-56 Questions 57-59 Questions 60-62 Questions 63-65 Questions 66-69 Questions 70-73 Questions 74-76  Questions 77-79  Questions 80-82  Questions 83-85 

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