Kemija - 2009./10. ljeto - 2.

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

$\mathrm{B}\mathrm{a}\mathrm{O}\backslash mathrm\{BaO\}$

${\mathrm{C}\mathrm{a}\mathrm{C}\mathrm{l}}_2\backslash mathrm\{CaCl\}\_\{2\}$

$\mathrm{N}\mathrm{a}\mathrm{C}\mathrm{l}\backslash mathrm\{NaCl\}$