Diethyl ether can be made from ethanol. The reaction is: 2 C2H5OH(l) ? (C2H5)2O(l) + H2O(l) In one experiment 46.0 g of ethanol yielded 34.7 g of diethyl ether. What was the percent yield in this experiment?
A) 62.1%
B) 80.4%
C) 93.8%
D) 97.0%
C
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According to your textbook, the fastest growing religion in the U.S. is
A) Islam. B) Norse Mythology. C) Orthodox Christianity. D) Animism. E) Hinduism.
Which of the following is not one of the major groups of terrestrial vegetation biogeographers often designate?
A) grassland B) forest C) savanna D) desert E) phytoplankton
What partly explains the seabed topography we observe?
A) The jostling due to plate tectonics. B) The greater density of continental lithosphere. C) The presence of continental margins. D) The little interaction with the asthenosphere.
The document produced by the Rio+20 conference in 2012 included
A) having the goal of 100% sustainable agriculture by 2020. B) the goal of eliminating world hunger. C) pressing rapidly forward with the development of new genetically modified crops. D) a consensus that global conditions for natural disasters, more jobs, and sustainable energy were dramatically improving.