Chemistry
Chemistry, 21.06.2019 23:50, kukisbae

How does a scientist the government? a. the scientist tells people in society what to do. b. the scientist determines the policies that the government spends money on. c. the scientist provides unbiased information to the government. d. the scientist makes laws based on his or her research results.

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Chemistry, 21.06.2019 21:00, HelenKellerwasaSlutt
The earth's moon is unusually large. two popular theories of the moon's origin include the "sister world" hypothesis, which states that the moon formed from the same materials as the earth, near enough to the earth that they fell into orbit around each other. a second theory is the "capture" hypothesis, in which the moon formed elsewhere in the solar system, and the earth's gravity pulled it into its orbit. studies of what the moon is made of indicate that some of its materials had to come from the earth or from the same area of the solar system where the earth had formed. at the same time, the moon does not contain much of the material that makes up the earth's core, so the moon could not have formed from the same materials as the earth. how do the two facts above affect the described theories of the moon's origin? a. they show that scientists will never agree on where the moon came from. b. they show that more experiments on moon formation need to be done. c. they show that no theory accounts for the existence of the moon. d. they show that neither theory is complete and entirely correct.
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Chemistry, 21.06.2019 21:30, artemiscrock77041
The reaction q+r2=r2q is found to be first order in r2 and
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Chemistry, 22.06.2019 01:00, trea56
Cumene is made by alkylation of benzene with propylene over zeolitic catalyst. to maximize selectivity to desired products, several beds of catalyst are used inside the same reactor. a mixture of feed and recycle benzene enters the top of the reactor and the feed propylene is split so that a portion of the propylene is fed to each catalyst bed. a large excess of benzene is used, to minimize propylene oligomerization and ensure complete reaction of propylene. the reactor product is cooled and sent to a stabilizer column that removes any light hydrocarbons. the bottoms from this column is sent to a benzene column that recovers benzene overhead for recycle to the alkylation and transalkylation reactors. the bottoms from the benzene column is distilled to give cumene product and a heavy stream. the heavy stream is further distilled in a heavies column to give a mixture of dipropyl- and tripropyl-benzene overhead and a heavy waste stream as bottoms. the distillate from the heavies column is sent to a transalkylation reactor and reacted with excess benzene. the product from the transalkylation reactor is returned to the benzene column. sketch a block flow diagram of the process.
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Chemistry, 22.06.2019 04:20, lindseysmith9522
Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from
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