Em tham khảo nha:
\(\begin{array}{l}
2)\\
{n_S} = \dfrac{{12,8}}{{32}} = 0,4\,mol\\
{A_S} = 0,4 \times 6,02 \times {10^{23}} = 2,408 \times {10^{23}}\\
3)\\
{M_{Ne}} = 20,179 \times 1,6605 \times {10^{ - 27}} = 3,3507 \times {10^{ - 26}}(kg)\\
4)\\
{M_C} = 6 + 6 = 12u\\
{M_C} = 12 \times 1,6605 \times {10^{ - 27}} = 1,9926 \times {10^{26}}(kg)\\
5)\\
a)\\
TSH = {p_{Al}} + {e_{Al}} + {n_{Al}} = 13 + 14 + 13 = 40\\
b)\\
{M_{Al}} = 13 + 14 = 27u\\
{M_{Al}} = 27 \times 1,6605 \times {10^{ - 27}} = 4,48335 \times {10^{ - 26}}(kg)\\
c)\\
{n_{Al}} = \dfrac{{27}}{{27}} = 1\,mol\\
{A_{Al}} = 1 \times 6,02 \times {10^{23}} = 6,02 \times {10^{23}}
\end{array}\)
