Nguyên tử aluminum (kí hiệu là Al) gồm 13 proton và 14 neutron. Khối lượng proton có trong 27g aluminium là
Nguyên tử aluminum (kí hiệu là Al) gồm 13 proton và 14 neutron. Khối lượng proton có trong 27g aluminium là
Hãy suy nghĩ và trả lời câu hỏi trước khi xem đáp án
- Số mol của Al là: $n_{Al} = \frac{27}{27} = 1$ mol
- Số proton trong 1 nguyên tử Al là 13
- Khối lượng của 1 proton là $1,6726219 \times 10^{-24}$ g
- Số Avogadro $N_A = 6.02214076 × 10^{23}$
Vậy khối lượng proton có trong 27g Al là: $1 \times 13 \times 6.02214076 \times 10^{23} \times 1.6726219 \times 10^{-24} = 13.0972$ g
Do đó đáp án đúng là B.
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Từ nào sau đây không phải là từ Hán Việt?
