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2 năm trước
B5: cho 6,5g (Zn) kẽm phản ứng với axit clohiđric (HCI) theo sơ đồ sau: Zn + HCI —> XnCl2 + H2 a) lập phương trình phản ứng hoá học xảy ra b) tính thể tích khí H2 thu đc ở đktc c) tính khối lượng axit HCI cần dùng d) tính khối lượng ZnCl2 thu đc ( cho nguyên tử khối: Zn=65; H=1; Cl=35,5) Nhắc nhở là các số 2 đều bé hết nhé Giúp với
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