9. A drop of olive oil of radius 0.25 mm spreads into a circular film of radius 10 cm on
water surface. Estimate the molecular size of olive oil.
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Let us suppose that olive oil spreads as a film which is one molecule thick on the water surface. then the thickness of the film would give an estimate of diameter of the molecule.
d= volume of the oil drop/ area of the film
= 4/3 *pi* (0.025cm)^3/(pi* (10 cm)^2
= 2.08X10^-7 cm
Explanation:
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