<http://schema.org/dateModified>
"2015-10-26T03:26:26Z"^^<http://schema.org/Date>
<http://chemwiki.ucdavis.edu/Physical_Chemistry/Equilibria/Chemical_Equilibria/Calculating_an_Equilibrium_Concentration/Calculating_an_Equilibrium_Constant%2C_Kp%2C_with_Partial_Pressures>