When a solution of palmitic acid (Mol. Mass = 256) in benzene containing 5.12 gm of acid/lit. is dropped on water surface, the benzene evaporates and the acid forms a monolayer film. The area covered by one molecule of palmitic acid is `1.54 nm^(2)`. Assuming each molecule of palmitic acid to be a sphere, answer the question that follow. `[N_(A) = 6xx10^(23)]`
What is the approx density of each molecule of palmitic acid?

Options

A. `0.3 gm//ml`
B. `0.4 gm//ml`
C. `0.5 gm//ml`
D. `1 gm//ml`

Answer

A