A 2.650 g sample of a binary compound containing only magnesium and oxygen is decomposed

CHEMISTRY · Single correct · AP · Chemistry · Atomic Structure and Properties · Atomic Structure and Properties

Problem

A 2.650 g sample of a binary compound containing only magnesium and oxygen is decomposed, yielding 1.580 g of magnesium metal. What is the mass percent of oxygen in the compound? (a) 59.6\% (b) 67.7\% (c) 40.4\% (d) 39.7\%

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