True, Scientific theories may change with the addition of new information or improved experiments and observations.
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Non metals could be:
pencils
books
paper
metals could be:
pens
Tablet/Phone
Answer:
c2h4 (etthane........
bexcuse it has 6 bond of hydrogen
There are a lot of separation processes. To name a few, these can be distillation, centrifugation, extraction, membrane or sorption process and many other. To know which is the best technique, you should know the property between two substances that have a stark difference. In this case, it is the polarity. Ethyl alcohol is more polar than ethyl ester and less dense. Thus, these two won't mix. So, take advantage of their density difference by decantation or centrifugation.