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tiendau_tinhsau


khi cho NAOH tac' dung voi' zn(2+) va` fe(3+) thi` NAOH se~ tac' dung voi' chat' nao` truoc'?
tra? loi` nhanh duoc kho^ng cac' ban, cam' on nhieu` nha!!!!!!!11
tra? loi` nhanh duoc kho^ng cac' ban, cam' on nhieu` nha!!!!!!!11