I also thought it was an error, but Wikipedia says:<p>12 H2S + 6 CO2 -&gt; C6H12O6 (=carbohydrate) + 6 H2O + 12 S<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Chemosynthesis" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Chemosynthesis</a>