How many atoms of copper are in a toy top?

Question

A toy top has a mass of 32.0g Cu. How many atoms of Cu are in this spinning top, given that the average atomic mass of copper is 63.55 amu?

Answer 1

32.0 g Cu x 1 mol Cu / 63.55 g x 6.022x10²³ atoms / mol = 3.03x10²³ atoms of Cu