posted by jessica on .
Earth has a mass of 5.98 × 1024 kg. The average mass of the atoms that make up Earth is 40 u. How many atoms are there in Earth?
it didn't work
If ME is the mass of Earth, m is the average mass of an atom in Earth, and N is the number of atoms, then
ME = N · m or N = ME/m.
N =ME/m= (5.98 × 10^24kg) / ((40u)(1.661 × 10^−27kg/u)) = 9.0 × 10^49