Estimate the average number of atoms comprising a bacterium for example Escherichia coli. Assume that the bacterium is a cylinder of 2mum length, 0.5mum diameter (and for practical purposed is made up mainly of water, which has a density of 1kg/liter). Suppose that the average mass of an atom in the bacterium is 10 times the mass of a hydrogen atom (1.66 * 10-24g).