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datntnsl
2 năm trước
Cách tính nữa nha 11 Nguyên tử cacbon có khối lượng bằng 1,9926.10-23 gam. Khối lượng tính bằng gam của nguyên tử natri là A: 3,82.10-21 gam. B: 3,82.10-22 gam. C: 4,48.10-23 gam. D: 3,82.10-23 gam.
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