An oxygen $(O_2)$ molecule is adsorbed on a patch of surface $($see sketch at right$).$ This patch is known to contain $1024$ adsorption

sites. The $(O_2)$ molecule has enough energy to move from site to site, so it could be on any one of them.

Suppose part of the surface becomes inaccessible, so that only $576$ adsorption sites are now available for the molecule. Calculate

the change in entropy.

Round your answer to $3$ significant digits, and be sure it has the correct unit symbol.

One way an $O_2$ molecule could

be adsorbed on a patch of

surface with $16$ sites.