An ionic compound contains 20.3 % metal M and 79.7 % chlorine by mass

CHEMISTRY · Single correct · A Level · Chemistry · Amount of substance · Amount of substance

Problem

An ionic compound contains 20.3 % metal M and 79.7 % chlorine by mass. Analysis shows that there are three chloride ions for every one M ion. Which element is most likely to be M? (a) Mg\mathrm{Mg} (b) Ga\mathrm{Ga} (c) Al\mathrm{Al} (d) Na\mathrm{Na}

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