# Surface area of atomized molecules?

I have the following problem, which seems easy, I just cannot get my brain around it....

Assume that $$30.0 cm^3$$ of gasoline is atomized into N spherical droplets, each with a radius of $$2.00\times 10^{-5} m$$. What is the total surface area of these N spherical droplets?

How do I find the number of gasoline molecules in a given amount of liquid, when I have the size of the radius??

Thank you

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Tide
Homework Helper
You know the radius of each drop so you can calculate the volume of each drop. You also know the total volume of N drops. Therefore ... ! :-)

I though I would need the density or the mole number for gasoline in order to get an accurate number. Which was not given.

Thank you!

Tide