Quan Nhat Dan Ha
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Nung m gam hon hop X gom FeS va FeS[SUB]2 [/SUB]trong mot binh kin chua khong khi ( gom 20% the tich O[SUB]2 [/SUB]va 80% the tich N[SUB]2[/SUB]) den khi phan ung xay ra hoan toan,[SUB],[/SUB] thu duoc chatran va hon hop khi Y co thanh phan the tich N[SUB]2[/SUB]=84,77%, SO[SUB]2[/SUB]=10,6%,con lai la O[SUB]2[/SUB].thanh phan % theo khoi luong cua FeS trong X la:
A.59,46% B.42,3% C.68,75% D.26,83%
A.59,46% B.42,3% C.68,75% D.26,83%