The mass of a single molybdenum atom is 1.59×10-22 grams. How many molybdenum atoms would there be in 331 milligrams of molybdenum?

Answer 1

331 mg x 1 g / 1000 mg x 1 atom / 1.59x10^-22 g = 2.08x10²¹ atoms of molybdenum