Calculate the number of molecules present in a spherical drop of water having a radius 1 mm if density of water is 1 g `cm^(-3)`.

Explanation

To calculate the number of molecules present in a spherical drop of water with a radius of 1 mm and a density of 1 g/cm³, we can follow these steps:

### Step 1: Calculate the Volume of the Spherical Drop
The formula for the volume \( V \) of a sphere is given by:
\[ V = \frac{4}{3} \pi r^3 \]
where \( r \) is the radius of the sphere.
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