Compléter les trous avec des nombres entiers, puis cliquer sur "Vérifier".Chaque trou doit comporter un nombre entier le plus petit possible. Vous pouvez passer d'un trou à un autre en utilisant la touche tabulation.

${\displaystyle C_2{H}_6}$ + ${\displaystyle O_2}$ -----> ${\displaystyle C{O}_2}$ + ${\displaystyle H_{2}O}$
${\displaystyle C_2{H}_{6}O}$ + ${\displaystyle O_2}$ -----> ${\displaystyle C{O}_2}$ + ${\displaystyle H_{2}O}$
${\displaystyle N{H}_3}$ + ${\displaystyle O_2}$ -----> ${\displaystyle N_2}$ + ${\displaystyle H_{2}O}$
${\displaystyle N{H}_3}$ + ${\displaystyle O_2}$ -----> ${\displaystyle NO}$ + ${\displaystyle H_{2}O}$
${\displaystyle C{H}_4}$ + ${\displaystyle C{l}_2}$ -----> ${\displaystyle CHC{l}_3}$ + ${\displaystyle HCl}$
${\displaystyle CaO}$ + ${\displaystyle C}$ -----> ${\displaystyle Ca{C}_2}$ + ${\displaystyle CO}$
${\displaystyle Fe}$ + ${\displaystyle H_{2}O}$ -----> ${\displaystyle F{e}_3{O}_4}$ + ${\displaystyle H_2}$
${\displaystyle CO}$ + ${\displaystyle F{e}_3{O}_4}$ -----> ${\displaystyle C{O}_2}$ + ${\displaystyle Fe}$
${\displaystyle H_{2}S}$ + ${\displaystyle O_2}$ -----> ${\displaystyle H_{2}O}$ + ${\displaystyle S{O}_2}$
${\displaystyle A{l}_2{O}_3}$ + ${\displaystyle C}$ + ${\displaystyle C{l}_2}$ -----> ${\displaystyle AlC{l}_3}$ + ${\displaystyle CO}$
${\displaystyle C{u}_{2}S}$ + ${\displaystyle C{u}_{2}O}$ -----> ${\displaystyle Cu}$ + ${\displaystyle S{O}_2}$