Question

Calculate the moles of Fe in 9.75×10²² atoms of Fe.

Answer 1

To calculate the moles of Fe from atoms, divide the number of atoms (9.75 \u00d7 1022) by Avogadro's constant (6.022 \u00d7 1023 atoms/mol) to obtain 0.162 moles of Fe.

Step-by-step explanation:

To calculate the number of moles of Fe from the given number of atoms, we use Avogadro's constant, which is 6.022 \u00d7 1023 atoms/mol. This constant represents the number of atoms in one mole of a substance.

Step-by-Step Calculation:

1. Determine the number of atoms of Fe given: 9.75 \u00d7 1022 atoms of Fe.
2. Use Avogadro’s number (6.022 \u00d7 1023 atoms/mol) to find the moles of Fe.
3. Set up the conversion from atoms to moles:
   moles of Fe = (9.75 \u00d7 1022 atoms Fe) / (6.022 \u00d7 1023 atoms/mol).
4. Perform the division to find the moles of Fe.

The calculation will yield: moles of Fe = 0.162 moles (rounded to three significant figures).