Which of the following is not an isomer of ethyl acetate?
A) methyl propanoate
B) propyl formate
C) butanoic acid
D) None, they are all isomers of ethyl acetate.
D
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Clouds continually are pulled to the ground by gravity. Why do they stay aloft?
A. New cloud droplets continually replace those that fall to Earth's surface. B. Water evaporating from Earth's surface presents an opposing force to the falling cloud droplets. C. Updrafts of air oppose the gravitational force. D. Clouds weigh so little that they fall too slowly to be noticed.
After slavery was abolished, rather than pay higher wages to freedmen (former slaves), wealthy landowners and investors claimed that their "labor shortage" could be solved by bringing in destitute and hungry ________
A) Chinese B) Europeans C) Japanese D) Americans E) Mexicans
What is considered an important factor in shaping western boundary continental rises?
A) Turbidity currents B) The width of the shelf slope C) Erosion rates D) Deep-ocean currents
How are people living near the Great Lakes impacted by the weather changes related to presence of a large body of water?
A) Temperatures are unaffected by the presence of the lakes, and precipitation is increased. B) Temperatures are unaffected by the presence of the lakes, and precipitation is decreased. C) Temperatures are moderated by the presence of the lakes, but precipitation is increased. D) Temperatures are moderated by the presence of the lakes, but precipitation is decreased.