Câu 6: Cho 12,6 gam hợp kim gồm Al và Mg tác dụng hoàn toàn với dung dịch H2SO4 loãng, tạo ra 13,44 lít khí H2 (đktc). Hãy tính: a)Thành phần phần trăm % khối lượng mỗi kim loại trong hợp kim. b) Khối lượng dung dịch H2SO4 20% tối thiểu cần dùng. làm hộ mình nhanh với mn cần gấp

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