The following data are for the chemisorption of hydrogen on copper powder at $25C.$ Confirm that they fit the Langmuir isotherm at low coverages. Then find the value of $K$ for the adsorption equilibrium and the adsorption volume corresponding to complete coverage.

$\backslash$table$[[\frac{p}{P}a,25,129,253,540],[\frac{V}{c}{m}^3,0\mathrm{.}042,0\mathrm{.}163,0\mathrm{.}221,0\mathrm{.}321]]$