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 oxi

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.