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Maidanh
2 năm trước
Hãy so sách xem: A. Nguyên tử oxi nặng hay nhẹ hơn nguyên tử cacbon bao nhiêu lần ? B. Nguyên tử sắt nặng hay nhẹ hơn nguyên tử bạc báo nhiêu lần ? C. Hai nguyên tử mange nặng bằng mấy nguyên tử oxi? Giúp với mik đưa 5 sao luôn 🙏
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