January 2011 Chemistry Regents #54-55

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Questions

Base your answers to questions 54 to 55 on the information below.

In an experiment, 2.54 grams of copper completely reacts with sulfur, producing 3.18 grams of copper(I) sulfide.

54 Determine the total mass of sulfur consumed. [1]

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ANSWER==>0.64g

3.18-2.54=0.64g

55 Write the chemical formula of the compound produced. [1]

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Cu2S

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

Questions 51-53 Questions 54-55 Questions 56-57 Questions 58-59 Questions 60-61 Questions 62-63 Questions 64-65 Questions 66-68 Questions 69-71 Questions 72-74 Questions 75-77 Questions 78-80 Questions 81-83

 
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