FORMULA2
'(<a href="http://www.j-archive.com/media/2011-04-14_J_30.jpg" target="_blank">Kelly of the Clue Crew shows some structural formulas on the monitor.</a>)  Alkanes are organic compounds that have carbon atoms arranged in a row; C<sub>2</sub>H<sub>6</sub> is ethane; add one carbon & two hydrogens to get C<sub>3</sub>H<sub>8</sub>, <a href="http://www.j-archive.com/media/2011-04-14_J_30a.jpg" target="_blank">this</a> backyard barbecue staple'
propane