Question

Why do all the metal pieces get polished before the experiment.

Answer 1

metal pieces is cleaned because there is a layer of metal oxide, so it is necessary to remove as it slows down the experiment

Answer 2

Metal pieces get tall is before the experiment because to remove the metal oxide !Metal prices are polished before the experiment because to remove the topmost layer of it as when the metal is burnt the metal oxide will prevent the metal piece from further oxidation.

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