1. Find the molar mass of copper:
* The molar mass of copper (Cu) is 63.55 g/mol.
2. Calculate the number of moles of copper:
* Divide the mass of copper by its molar mass:
* moles of Cu = 6.35 g / 63.55 g/mol = 0.1 mol
3. Use Avogadro's number to find the number of atoms:
* Avogadro's number is 6.022 x 10²³ atoms/mol.
* Multiply the number of moles by Avogadro's number:
* number of atoms = 0.1 mol * 6.022 x 10²³ atoms/mol = 6.022 x 10²² atoms
Therefore, there are approximately 6.022 x 10²² copper atoms in 6.35 g of copper.
