June 2016 Chemistry Regents #59-60

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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

Question 51 Questions 52-53 Questions 54-55 Questions 56-58 Questions 59-60 Questions 61-62 Questions 63-65 Questions 66-69  Questions 70-71  Questions 72-74  Questions 75-77  Questions 78-81  Questions 82-85

 

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Question 59-60

 

 

Base your answers to questions 59 through 60 on the information below and on your knowledge of chemistry.

At 1023 K and I atm, a 3.00-gram sample of SnO2(s) (gram-formula mass = 151 g/mol) reacts with hydrogen gas to produce tin and water, as shown in the balanced equation below.

SnO2(s) + 2H2(g) ==>Sn(L) + 2H2O(g)

59        Show a numerical setu for calculating the number of moles of Sn02(s) in the 3.00-gram sample. [I]

Answer-->    ( 3.00g)/(151g/mol)

no units needed for credit

60        Determine the number of moles of Sn(L) produced when 4.0 moles of H2(g) is completely consumed. [1]

Answer--> 2.0 moles

on to Questions 61-62

 

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

Question 51 Questions 52-53 Questions 54-55 Questions 56-58 Questions 59-60 Questions 61-62 Questions 63-65 Questions 66-69  Questions 70-71  Questions 72-74  Questions 75-77  Questions 78-81  Questions 82-85

 

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