June 2009 Chemistry Regents #74-76

Highlight to reveal answers and explanations

Back to Regents Exams

 

Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50 Questions 51-53 Questions 54-57 Questions 58-59 Questions 60-62 Questions 63-65 Questions 66-67 Questions 68-70 Questions 71-73 Questions 74-76 Questions 77-78 Questions 79-83

Questions

Base your answers to questions 74 through 76 on the information below. During a bread-making process, glucose is converted to ethanol and carbon dioxide, causing the bread dough to rise. Zymase, an enzyme produced by yeast, is a catalyst needed for this reaction. 74 Balance the equation in your answer booklet for the reaction that causes bread dough to rise, using the smallest whole-number coefficients. [1] HIGHLIGHT TO SEE THE ANSWER   1 C6H12O6===> 2 C2H5OH + 2 CO2 75 In the space in your answer booklet, draw a structural formula for the alcohol formed in this reaction. [1] LINK TO SEE THE ANSWER 76 State the effect of zymase on the activation energy for this reaction. [1] HIGHLIGHT TO SEE THE ANSWER Zymase lowers the activation energy. (It's an enzyme which is a catalyst) Next Questions

Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50 Questions 51-53 Questions 54-57 Questions 58-59 Questions 60-62 Questions 63-65 Questions 66-67 Questions 68-70 Questions 71-73 Questions 74-76 Questions 77-78 Questions 79-83

Back to Regents Exams