166 milligrams is equal to 0.166 grams.
If 2.28x10^-22 grams is the mass of 1 atom, then 0.166 grams would constitute how many atoms?
The equation we would make is as follows:
2.28x10^-22/1 = 0.166/x
- If we cross multiply and solve for x, we get the answer which is 7.28x10^20 atoms.