Aluminum metal reacts with iron(II) sulfide to form aluminum ...

[Engineer]

Aluminum metal reacts with iron(II) sulfide to form aluminum sulfide and iron metal. What is the stoichiometric coefficient for aluminum when the chemical equation is balanced using the lowest, whole-number stoichiometric coefficients?
 
  A) 1
  B) 2
  C) 3
  D) 4

Question 2

The half-reaction occurring at the anode in the balanced reaction shown below is ________. 3MnO4- (aq) + 24H+ (aq) + 5Fe (s)  3Mn2+ (aq) + 5Fe3+ (aq) + 12H2O (l)
 
  A) MnO4- (aq) + 8H+ (aq) + 5e-  Mn2+ (aq) + 4H2O (l)
  B) 2MnO4- (aq) + 12H+ (aq) + 6e-  2Mn2+ (aq) + 3H2O (l)
  C) Fe (s)  Fe3+ (aq) + 3e-
  D) Fe (s)  Fe2+ (aq) + 2e-
  E) Fe2+ (aq)  Fe3+ (aq) + e-

Question 3

A low-carbohydrate diet depletes the body's glycogen. Every pound of glycogen lost results in a weight loss of
 
  A) 1 pound of glycogen.
  B) 2 pounds (1 pound of glycogen and 1 pound of water).
  C) 3 pounds (1 pound of glycogen, 1 pound of muscle, and 1 pound of water).
  D) 4 pounds (1 pound of glycogen and 3 pounds of water).

[Chocorrol77]

Answer to Question 1

B

Answer to Question 2

C

Answer to Question 3

D

[Engineer]

Wow, this really help

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Gracias!