What are the approximate bond angles at the OH-bearing carbon atom of all alcohols?
A) 90°
B) 109°
C) 120°
D) 180°
B
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The use of hydrogen gas would eliminate most of the air pollution problems we have today because:
a. When it burns it combines with carbon dioxide and removes it from the air. b. When it burns it combines with water to produce heavy rainwater. c. When it burns it combines with oxygen gas in the air to produce water vapor. d. When it burns it combines with carbon to produce methane gas. e. More than one of the answers is correct.
The Hawai'ian Islands formed as they pass over a hot spot in the middle of the ____
A) Mid-Atlantic ridge B) Nazca Plate C) Mariana Trench D) Pacific Plate
During a solar eclipse, the ________ casts a small circular shadow on the ________.
A. Moon; Sun B. Sun; Moon C. Moon; Earth D. Earth; Sun
The troposphere is warmed mostly by
A) short-wave radiation. B) long-wave radiation. C) solar radiation. D) clouds.