January 2014 Chemistry Regents #76-77

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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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Questions

 

  Base your answers to questions 76 through 77 on the information below.
Silver-plated utensils were popular before stainless steel became widely used to make eating utensils. Silver tarnishes when it comes in contact with hydrogen sulfide, H2S, which is found in the air and in some foods. However, stainless steel does not tarnish when it
comes in contact with hydrogen sulfide.
 
76 In the space in your answer booklet, draw a Lewis electron-dot diagram for the compound that tarnishes silver. [1]
 

77 In the ground state, an atom of which noble gas has the same electron configuration as the sulfide ion in Ag2S? [1]
Answer==>  Argon

on to Questions 78-81

 

 
 

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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