Em tham khảo nha:
\(\begin{array}{l}
4)\\
a)\\
\overline {{M_{Cl}}} = \dfrac{{35 \times 75,53 + 24,47 \times 37}}{{100}} = 35,4894\\
\overline {{M_H}} = \dfrac{{1 \times 99 + 2 \times 1}}{{100}} = 1,01\\
b)\\
- {}_1^1H{}_{17}^{35}Cl:PTK = 1 + 35 = 36\\
- {}_1^1H{}_{17}^{37}Cl:PTK = 1 + 37 = 38\\
- {}_1^2H{}_{17}^{35}Cl:PTK = 2 + 35 = 37\\
- {}_1^2H{}_{17}^{37}Cl:PTK = 2 + 37 = 39\\
5)\\
{A_{{X_1}}} = 35 + 44 = 79\\
{A_{{X_2}}} = 35 + 44 + 2 = 81\\
\% {X_1} = \dfrac{{27}}{{27 + 23}} \times 100\% = 54\% \\
\% {X_2} = 100 - 54 = 46\% \\
\overline {{M_X}} = \dfrac{{79 \times 54 + 81 \times 46}}{{100}} = 79,92
\end{array}\)
