Final answer:
The number of moles of Ni in a sample containing 4.30×1024 atoms is approximately 7.14 moles, calculated using Avogadro's number.
Step-by-step explanation:
To calculate the number of moles of Ni (nickel) from a given number of atoms, one needs to use Avogadro's number, which is 6.022×1023 atoms per mole. The question asks, "How many moles of Ni are there in a sample of Ni that contains 4.30×1024 atoms?"
The formula to find the number of moles (n) is:
n = Number of atoms / Avogadro's number
Using the formula:
n = (4.30×1024 atoms Ni) / (6.022×1023 atoms/mol) = approximately 7.14 moles of Ni