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a relative measure of the mass contribution of each component in a compound. The percentage composition of a part of a compound is the percentage mass that the part contributes to the whole compound.
there are not enough electrons to contribute to an ordinary covalent bond.
the tail gas is the mixture of gases left over and discarded at the end of the industrial...
substances are seperated by the use of their different boiling points.
polymerisation reaction that is started by a radical.