What is the coefficient of the permanganate ion when the following equation is balanced? MnO4- + Br- Mn2+ + Br2 (acidic solution)
A) 1
B) 2
C) 3
D) 5
E) 4
Question 2
What is the oxidation state of carbon in the carbonate ion?
A) +4
B) +2
C) 0
D) -2
E) -4
Question 3
One significant difference between gases and liquids is that ________.
A) a gas is made up of molecules
B) a gas expands to fill its container
C) a gas may consist of both elements and compounds
D) gases are always mixtures
E) All of the above answers are correct.
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