<a href="https://en.wikipedia.org/wiki/Acetylene" class="extiw" title="en:Acetylene">Acetylene</a>, <a href="https://en.wikipedia.org/wiki/carbon_monoxide" class="extiw" title="en:carbon monoxide">carbon monoxide</a>, and <a href="https://en.wikipedia.org/wiki/water" class="extiw" title="en:water">water</a> add together to give <a href="https://en.wikipedia.org/wiki/acrylic_acid" class="extiw" title="en:acrylic acid">acrylic acid</a>.
<a href="//commons.wikimedia.org/wiki/User:DMacks" title="User:DMacks">DMacks</a> (<a href="//commons.wikimedia.org/wiki/User_talk:DMacks" title="User talk:DMacks"><span class="signature-talk">talk</span></a>)
<span class="int-own-work" lang="en">Own work</span>