An element X exhibits variable valencies 3 and 5. Write the formulae of the chlorides of the element.
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the formulae of chloride of an element X=XCl . the chemical formulae of magnesium oxide is MgO . the element are present in the ratio of 24 :16 or 32 .
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(a) Formula of oxide of element X when its valenecy is 3. Thus, the formula of oxide of elemene X when its valency is 3 is X2O3. Thus, the formula of oxide of element X when its valency is 5 is X2O5.
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