Em tham khảo nha:
\(\begin{array}{l}
{M_{A{l_2}{{(S{O_4})}_3}}} = 27 \times 2 + 32 \times 3 + 16 \times 12 = 342\,dvC\\
{M_{310\,A{l_2}{{(S{O_4})}_3}}} = 310 \times 342 = 106020dvC\\
{m_{310\,A{l_2}{{(S{O_4})}_3}}} = 106020 \times 1,6605 \times {10^{ - 24}} = 1,76 \times {10^{ - 19}}(g)
\end{array}\)