The copper atoms of the cube contain 2445.86 × 10²³ atoms.
We need to know Avogadro's number to solve this problem. Avogadro's number is the number that explains how many copper atoms are in one mol. The Avogadro's number is
Na = 6,02 × 10²³ atoms / mol
From the question above, we know that
L = 14.23 cm
ρ = 8.96 g/cm³
Mr Cu = 63.546
Find the mole of copper
n = gr / Mr Cu
n = ρ . V / 63.546
n = 8.96 . 14.23³ / 63.546
n = 406.29 moles
By using Avogadro's number, we can calculate how many copper atoms
N = Na . n
N = 6,02 × 10²³ x 406.29
N = 2445.86 × 10²³ atoms
For more on Avogadro's number at: https://brainly.com/question/1581342
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