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dothihuonggdtx
2 năm trước
BAI 1: a) Mot loai oxit dong mau den co khoi luong mol phan tu la 80g. Oxit nay co thanh phan la 80%Cu va20%O. Hay tim cong thuc hoa hoc cua loai oxit dong noi tren. b) Hay tim cong thuc hoa hoc cua khi A biet: - Khi A nang hon khi hidro 17 lan. - Thanh phan theo khoi luong cua khi A la 5,88% H va 94,12% S. BAI 2: Cho 6,5g kem tac dung voi HCl theo so do phan ung : Zn+HCl---> ZnCl2+H2 a) Lap PTHH cua phan ung. b) Tinh khoi luong HCl da tham gia phan ung. c) Tinh the tich khi H2 (dktc) da sinh ra sau phan ung.
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