A certain substance in the form of spherical particles is found to adsorb 2.45×10^4

mole of sodium oleate per gram at 50°C. The particles have a

density of 0.930 g/ cm3

and are known to be spherical. If the area of the sodium oleate

molecule is 28.2 Å2

, find (a) the surface area of the solid in Å2

per gram, and

(b) the diameter of the particles in Å.