What bond angle is most closely associated with a trigonal planar distribution of electron density?
A) 90°
B) 109.5°
C) 120°
D) 180°
C
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During spheroidal weathering of a rectangular stone, the ___
A)stone keeps its shape indefinitely B)corners are attacked by weathering from three sides C)flat surfaces are attacked by weathering from two sides D)flat surfaces are altered more rapidly by weathering E)stone breaks into large chunks
Convective motion in the atmosphere is approximately ________ times faster than convective motion in the mantle
A) 2,500,000,000 B) 100,000 C) 2,500,000 D) 2,500
Why is one region of a water molecule slightly negatively charged?
A) The oxygen atom attracts protons more strongly than the hydrogen atoms do. B) The hydrogen atoms attract protons more strongly than the oxygen atom does. C) The oxygen atom attracts electrons more strongly than the hydrogen atoms do. D) The hydrogen atoms attract electrons more strongly than the oxygen atom does.
Dip is defined as:
a. the direction of a line formed by the intersection of a bedding plane and a vertical plane b. the vertical angle formed between a horizontal plane and a bedding plane c. the direction of a line formed by the intersection of a horizontal plane and a bedding plane d. none of the above