Đáp án + giải thích các bước giải:

Câu `16:`

`a.`

$^{1}_{1}H^{16}_{8}O^{1}_{1}H$

$^{2}_{1}H^{16}_{8}O^{2}_{1}H$

$^{1}_{1}H^{16}_{8}O^{2}_{1}H$

-

$^{1}_{1}H^{17}_{8}O^{1}_{1}H$

$^{2}_{1}H^{17}_{8}O^{2}_{1}H$

$^{1}_{1}H^{17}_{8}O^{2}_{1}H$

-

$^{1}_{1}H^{18}_{8}O^{1}_{1}H$

$^{2}_{1}H^{18}_{8}O^{2}_{1}H$

$^{1}_{1}H^{18}_{8}O^{2}_{1}H$

`b.`

$^{1}_{1}H^{16}_{8}O^{1}_{1}H$

$^{2}_{1}H^{16}_{8}O^{2}_{1}H$

$^{3}_{1}H^{16}_{8}O^{3}_{1}H$

$^{1}_{1}H^{16}_{8}O^{2}_{1}H$

$^{1}_{1}H^{16}_{8}O^{3}_{1}H$

$^{2}_{1}H^{16}_{8}O^{3}_{1}H$

-

$^{1}_{1}H^{17}_{8}O^{1}_{1}H$

$^{2}_{1}H^{17}_{8}O^{2}_{1}H$

$^{3}_{1}H^{17}_{8}O^{3}_{1}H$

$^{1}_{1}H^{17}_{8}O^{2}_{1}H$

$^{1}_{1}H^{17}_{8}O^{3}_{1}H$

$^{2}_{1}H^{17}_{8}O^{3}_{1}H$

-

$^{1}_{1}H^{18}_{8}O^{1}_{1}H$

$^{2}_{1}H^{18}_{8}O^{2}_{1}H$

$^{3}_{1}H^{18}_{8}O^{3}_{1}H$

$^{1}_{1}H^{18}_{8}O^{2}_{1}H$

$^{1}_{1}H^{18}_{8}O^{3}_{1}H$

$^{2}_{1}H^{18}_{8}O^{3}_{1}H$

Câu `17:`

`a.`

$\overline{M_{Br}}=\frac{79.50,69\%+81.49,31\%}{100%}=79,9862$

`b.`

$\overline{M_{Li}}=\frac{6.7,5\%+7.92,5\%}{100%}=6,925$

`c.`

$\overline{M_{Si}}=\frac{28.92,23\%+29.4,67\%+30.3,1\%}{100%}=28,087$

`d.`

$\overline{M_{Ni}}=\frac{58.67,76\%+60.26,16\%+61.1,25\%+62.3,66\%+64.1,16\%}{100%}=58,77$