A) How many simple distillation columns are required to purify a stream containing four components into five "pure" products? Sketch all possible sequences.​

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Which is true about metals used for jewelry, such as platinum and gold? a. they have low flammability. b. they have low reactivity. c. they have high flammability. d. they have high reactivity.

What can happen to an atoms electrons when an electric current is passed through the atom?