A drop of olive oil of radius 0.25 mm spreads into a circular film of radius 10 cm on the water surface. Estimate the size of molecule of oleic acid.

Explanation

To estimate the size of a molecule of oleic acid from the given problem, we can follow these steps:

### Step 1: Calculate the Volume of the Olive Oil Drop
The volume \( V \) of a sphere (which we will assume the drop is) is given by the formula:
\[ V = \frac{4}{3} \pi r^3 \]
where \( r \) is the radius of the drop.
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