Diễn đàn: Cấp 2

Năm học:2006-2007.Môn:Hóa Học. Vòng 1.Ngày 8/9/2006. TRẮC NGHIỆM 1/Cách hợp lí nhất để tách muối ra khỏi nước biển là: a.Lọc c.bay hơi b.dùng...

ĐỀ KIỂM TRA MÔN HOÁ Trường THCS Nguyễn Khuyến Thời gian:45' 1)Viết 10 pt khác nhau điều chế HCl trực tiếp từ Cl2 2) a.Tại sao nước mưa luôn có...

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