How many atoms are present in 3.2 moles of Fe?

• A. 1.93 × 10^{24} atoms
• B. 6.02 × 10^{23} atoms
• C. 3.2 × 10^{23} atoms
• D. 9.6 × 10^{24} atoms

Answer: (A)

Verified step by step guidance

1. Identify the quantity given: 3.2 moles of Fe (iron atoms).
2. Recall that one mole of any substance contains Avogadro's number of particles (atoms, molecules, etc.), which is \$6.02 \times 10^{23}$ particles per mole.
3. Set up the calculation to find the total number of atoms by multiplying the number of moles by Avogadro's number: \(\text{Number of atoms} = 3.2 \text{ moles} \times 6.02 \times 10^{23} \text{ atoms/mole}\).
4. Perform the multiplication of the numerical coefficients (3.2 and 6.02) and add the exponents of 10 if necessary, keeping track of significant figures.
5. Express the final answer in scientific notation to represent the total number of Fe atoms in 3.2 moles.