Oil of volume \(1.0×10^{-2} \;cm^3\) is developed on the surface of clean water. If it spreads to form a circle of radius 4 cm, find the diameter of a molecule of oil.
\( 7.96×10^{-4} cm\)
\( 5.03×10^1 cm\)
\( 1.26×10^1 cm\)
\( 1.99×10^{-4} \; cm\)
