Em tham khảo nha:
\(\begin{array}{l}
{M_K} = 39\,dvC = 39 \times 1,6605 \times {10^{ - 24}} = 6,48595 \times {10^{ - 23}}(g)\\
{M_N} = 14\,dvC = 14 \times 1,6605 \times {10^{ - 24}} = 2,3247 \times {10^{ - 23}}(g)\\
{M_{Cl}} = 35,5\,dvC = 35,5 \times 1,6605 \times {10^{ - 24}} = 5,895 \times {10^{ - 23}}(g)
\end{array}\)