Answer:
n° atoms = 3.275x10²² atoms
Explanation:
To do this, we need to use the molecular weight of the copper, which is 63.55 g/mol.
Now, to know the number of atoms of any compound, we use the avogadro number which is relationed to the number of moles of any compound so:
1 mol = 6.02x10²³ atoms
In order to know the atoms, we need to calculate the moles of copper with the following expression:
n = m/MW
Doing so, we have the moles, and then, use the avogadro number to calculate the atoms:
First the moles:
n = 3.46/63.55 = 0.0544 moles
Now, let's calculate the atoms:
n° atoms = n * Av. number
n° atoms = 0.0544 ¨* 6.02x10²³
n° atoms = 3.275x10²² atoms
This would be the atoms in the penny.
