Which of the following is a useful approach for separating cyclopentanamine and cyclopentanol which are both dissolved in a solution of diethyl ether?
A) Wash the ether solution with aqueous HCl.
B) Wash the ether solution with aqueous NaOH.
C) Wash the ether solution with an aqueous ammonia solution.
D) None of these would affect the separation.
A
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Because of its cultural characteristics, Thailand has very low tolerance for transgendered people
Indicate whether this statement is true or false.
Judge the following sentence according to the criteria given below: Dead seaweed on the beach is incorrectly considered to be pollution by some people BECAUSE by definition, nature doesn't pollute
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct but the reason is incorrect. D) The assertion is incorrect but the reason is correct. E) Both the assertion and the reason are incorrect.
Most of the approximately 3,300 historic eruptions lasted ____
A)a few days B)from less than one month to six months C)one to two years D)more than two years E)more than 20 years
Scientists often depict their understanding of an organism's evolutionary ancestry in diagrams best by ________
A) taxonomic trees B) ancestral trees C) classification trees D) hierarchical trees E) phylogenetic trees