Answer: 24.9moles
Explanation:
1mole of a substance contains 6.02x10^23 atoms.
It therefore means that 1mole of phosphorus also contains 6.02x10^23 atoms.
We, need to find the number of moles of phosphorus that contains 1.50x10^25 atoms.
This can be done below
If 1 mole of phosphorus contains 6.02x10^23 atoms,
Therefore Xmol of phosphorus will contain 1.50x10^25 atoms. i.e
Xmol of phosphorus = (1.50x10^25)/6.02x10^23 = 24.9moles
Therefore, 24.9moles of phosphorus contains 1.50x10^25 atoms
