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khongdua456
2 năm trước
cho 14,90 gam hỗn hợp hai kim loại gồm Fe và Zn tác dũng vừa đủ đúng với dung dịch h2so4 loãng , thu được 5,60 lít khí H2 ( ở dktc ) cho fe=56 , Zn=65 a , viết các PTHH xảy ra b, tính thành phần trăm mỗi kim loại trong hỗn hợp ban đầu c , tính số mol h2so4 đã phản ứng
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