January 2014 Chemistry Regents #58-61

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

Questions 51-54 Questions 55-57 Questions 58-61 Questions 62-63 Questions 64-65 Questions 66-70

Questions 71-75 Questions 76-77 Questions 78-81 Questions 82-85

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Base your answers to questions 58 through 61 on the information below and on your knowledge of chemistry. 

 


 

Ethene and hydrogen can react at a faster rate in the presence of the catalyst platinum. The equation below represents a reaction between ethene and hydrogen.

58 Determine the molar mass of the product. [1]

Answer==> 30g/mol


59 State the number of electrons shared between the carbon atoms in one molecule of the reactant ethene. [1]

Answer ==>  4


60 Explain, in terms of activation energy, why the catalyzed reaction occurs at a faster rate. [1]

 

Answer==>  has a lower activation energy


61 Explain why the reaction is classified as an addition reaction. [1]

Answer==> Two hydrogen atoms are added to the molecule

on to Questions 62-63

 

 
 

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

Questions 51-54 Questions 55-57 Questions 58-61 Questions 62-63 Questions 64-65 Questions 66-70

Questions 71-75 Questions 76-77 Questions 78-81 Questions 82-85

 

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