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Author Question: Consider the following unbalanced half-reaction: MnO4- MnO2. The oxidation number of Mn changes ... (Read 139 times)

kamilo84

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on: Aug 27, 2018
Consider the following unbalanced half-reaction: MnO4-  MnO2. The oxidation number of Mn changes from ________, and the Mn is ________.
 
  A) +4 to +7; reduced
  B) +7 to +4; oxidized
  C) +4 to +7; oxidized
  D) +7 to +4; reduced

Question 2

What is the oxidation number of bismuth in Bi2O3?
 
  A) +1
  B) +2
  C) +3
  D) +6

Question 3

Calcium carbonate is NOT found in
 
  A) seashells.
  B) chalcopyrite.
  C) pearls.
  D) stalactites.


abctaiwan

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Reply #1 on: Aug 27, 2018
Answer to Question 1

D

Answer to Question 2

C

Answer to Question 3

B


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