Ammonia, NH3, is more polar than is borane, BH3, because
A. it has a lone pair of electrons.
B. its hydrogens are not exactly opposite one another.
C. it is less symmetrical than borane.
D. all of the above
Answer: D
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The disastrous affects of a large scale water transfer project was demonstrated in which water body?
A. Mediterranean sea B. Black sea C. Aral sea D. Red sea E. Bering sea
The following list is a list of facts.1.permafrost in the arctic is melting 2.Greenland and Antarctic ice sheets are losing mass. 3.the area covered by the Arctic sea ice is getting smaller. 4.sea level has risen. A logical conclusion is that
A. the climate is getting warmer. B. the oceans are getting more acid. C. carbon dioxide is increasing. D. these facts are not related.
During the light-dependent reactions of photosynthesis,
A) glucose is released. B) oxygen is released. C) glucose and oxygen are released. D) carbon dioxide is used to make glucose.
A large volcanic eruption can slightly cool the climate for a few years because ________.
A. volcanoes emit nitrogen (N2), a cooling agent in the atmosphere B. material they eject into the atmosphere reduces the amount of sunlight reaching Earth C. lava absorbs massive amounts of carbon dioxide as it cools D. volcanic gases bind with greenhouse gases, removing most of them from the atmosphere E. volcanic ash is good for soils and that speeds the growth of forests