Kemija - 2009./10. jesen - 2.

${\mathrm{H}}_2\mathrm{O}\backslash mathrm\{H\}\_\{2\}\; \backslash mathrm\{O\}$

${\mathrm{B}\mathrm{C}\mathrm{l}}_3\backslash mathrm\{BCl\}\_\{3\}$

${\mathrm{H}}_2\mathrm{S}\backslash mathrm\{H\}\_\{2\}\; \backslash mathrm\{~S\}$

${\mathrm{C}\mathrm{O}}_2\backslash mathrm\{CO\}\_\{2\}$