Solve the following question given below:
Question: Although these qualities vary from one type to another, a cell can be 2.2micrometers in diameter with a cell wall of 50nm thick. If the density of the wall material is the same as that of pure water, what is the mass (in mg) of the cell wall, assuming the cell to be spherical and the wall to be a very thin spherical shell?
Please explain how you came to your conclusion.