Kemija - 2022./23. probna - 6.

${\mathrm{H}}_3{\mathrm{O}}^{+}\backslash mathrm\{H\}\_\{3\}\; \backslash mathrm\{O\}^\{+\}$

${\mathrm{O}\mathrm{H}}^{-}\backslash mathrm\{OH\}^\{-\}$

${\mathrm{B}\mathrm{F}}_3\backslash mathrm\{BF\}\_\{3\}$

${\mathrm{N}\mathrm{H}}_3\backslash mathrm\{NH\}\_\{3\}$