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hungvuong662001
2 năm trước
Hòa tan hoàn toàn 10,4 gam hỗm hợp gồm MgCO3 và MgO bằng lượng vừa đủ dung dịch axit HCl 7,3%. Sau phản ứng thu được 2240 ml khí (ở đktc) a. Viết phương trình hóa học b. Tính khối lượng mỗi chất trong hỗn hợp ban đầu
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