Which equations are balanced?
A. Equations "a" and "c" are balanced.
B. Equations "b" and "c" are balanced.
C. Only equation "c" is balanced.
D. All of them are balanced.
Answer: A
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A solution is an acid when: a. it has an excess of hydrogen ions
b. it has an excess of hydroxide ions. c. it combines with a hydrogen ion. d. hydrogen and hydroxide are in balance.
Which climate type would normally have the highest afternoon temperatures during the summer?
A) A B) B C) C D) D
At the end of the Triassic (201 million years ago), flood basalts occurred during the opening of the Atlantic Ocean.
Answer the following statement true (T) or false (F)
The largest practical potential source of fresh water in the world is
A) soil moisture. B) lakes. C) groundwater. D) stream discharge. E) ice sheets and glaciers.