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thanchet502
2 năm trước
Câu 1: a) Tính hóa trị của Mg trong hợp chất MgCO3 (biết CO3 có hóa trị II) b) Lập CTHH của hợp chất tạo bởi Fe(III) và SO4(II) c) Nêu ý nghĩa của CTHH MgCO3 Câu 2: Dùng chữ số và CTHH diễn đạt các ý sau a) Hai nguyên tử thủy ngân b) Ba nguyên tử hiđro c) Bốn phân tử CanXi Cabonat Câu 3 Một hợp chất gồm 2 nguyên tử X liên kết với S nguyên tử Oxi và nặng hơn phân tử hiđro là 71 lần a) Tìm phân tử khối của hợp chất b) Tìm nguyên tử khối của X, cho biết tên và FHHH Câu 4: Tổng số hạt trong nguyên tử là 48, trong đó số hạt P là 16. Tìm số hạt mỗi loại Giải thích không dài dòng, dễ hiểu. nhanh nha 10p
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