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ngocvy908
2 năm trước
Đốt cháy hoàn toàn m(gam)Mg cần dùng vừa đủ 125,776 lít kk (đktc) biết oxi chiếm 20% thể tích kk. Giá trị m là: A.26,952 B.269,52 C. 2695,2 D. 26,95
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