What is the mass in grams of atom of copper and how many atom are there 1g of copper?

Answer 1

6.022*10**23 atoms / mol = avagadro's constant

63.546 g / mol = atomic weight of copper

1 atom / 6.022*10**23 atoms/mol * 63.546 g/mol = 1.05523082*10**-22g

1 g / 63.546 g/mol * 6.022*10**23 atoms/mol = 9.476599629*10**21 atoms

Answer 2

The Atomic Mass of copper is 63.55 grams. Therefore, one atom of copper has a mass of 63.55 grams. In 1 gram of copper, there are 1/63.55 ≈ 0.0157 moles of copper atoms. Since 1 mole contains Avogadro's number of atoms (6.022 x 10^23 atoms), there are approximately 9.45 x 10^21 copper atoms in 1 gram of copper.