4-4: Stoichiometry
Chapter 4

Dr. Robert Belford & Rebekah Reinhart




Question 1
How many grams of O2 is present upon completion of a reaction with 67.0 grams of C and 194 grams of O2? The unbalanced equation is

(A)  0.00g
(B)  16.0g
(C)  111g
(D)  NOTA
 
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Question 2
How much carbon is left over from the reaction of 67.0 grams of C and 194 grams of O2? The unbalanced equation is

(A)  0.00g
(B)  13.0g
(C)  27.0g
(D)  NOTA
 
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Question 3
If 212g CO2 is produced from the reaction of 67.0 grams of C and 194 grams of O2, what is the percent yield? The unbalanced equation is

(A)  86.2%
(B)  43.1%
(C)  64.2%
(D)  NOTA
 
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Question 4
If the percent yield of a reaction of 67.0 grams of C and 194 grams of O2 was 92.1%, how much CO2 is produced. The unbalanced equation is

(A)  212g
(B)  246g
(C)  227g
(D)  NOTA
 
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Question 5
How many grams of oxygen are present upon completion of the reaction of 120. grams of Al and 120. grams of O2? The unbalanced equation is

(A)  120.g
(B)  107g
(C)  13.0g
(D)  NOTA
 
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Question 6
How much Al2O3 is formed from the reaction of 120. grams of Al and 120 grams of oxygen if the percent yield is 91.6%. The unbalanced equation is

(A)  193g
(B)  207g
(C)  226g
(D)  NOTA
 
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