Câu 1) Trình bày tính chất hóa học của axit. Mỗi tính chất viết 2 PTHH minh họa ( chú ý không viết lại những ví dụ cô giáo đã dạy) Câu 2) Cho 6,5 gam hồn hợp kẽm và kẽm oxit tác dụng với dung dịch HCl dư, thu được V lít khí H, ở (ĐKTC) . Đốt cháy hoàn toàn lượng khí này thu được 0,9 gam nước. A, Hãy tính giá trị bằng số của V. B, Tính thành phần phần trăm khối lượng của kẽm trong hỗn hợp ban đầu. cần gấp tối nay nha mn

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