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hotruongluong810
2 năm trước
Dạng 2: Toán hỗn hợp Câu 2: Cho m1 (g)nhôm tác dụng vừa đủ với 7,84 lít O2 (đktc) thu được m2(g) một oxit. Tìm m1, m2 Câu 3: Cần bao nhiêu gam KMnO4 để điều chế được 3,36 lít oxi đktc)? Câu 4: Để điều chế oxi, người ta nung hoàn toàn 36,75 g KClO3 (xúc tác MnO2) thì thu được bao nhiêu lít O2 (đktc) ? Câu 5: Nếu dùng 2,45 gam KClO3 thì sau phản ứng hoàn toàn, thể tích O2 thu được (đktc) là:
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