How many atoms of gold (Au) are present in 4 moles of gold?

• A. 2.41 × 10^{24} atoms
• B. 1.50 × 10^{24} atoms
• C. 6.02 × 10^{23} atoms
• D. 4.00 × 10^{23} atoms

Answer: (A)

Verified step by step guidance

1. Recall that one mole of any substance contains Avogadro's number of particles (atoms, molecules, etc.), which is approximately \$6.02 \times 10^{23}$ particles per mole.
2. Identify that the problem asks for the number of atoms in 4 moles of gold (Au), so you will multiply the number of moles by Avogadro's number to find the total atoms.
3. Write the formula to calculate the number of atoms: \(\text{Number of atoms} = \text{moles} \times N_A\), where \(N_A = 6.02 \times 10^{23}\) atoms/mole.
4. Substitute the given values into the formula: \(\text{Number of atoms} = 4 \text{ moles} \times 6.02 \times 10^{23} \text{ atoms/mole}\).
5. Perform the multiplication to find the total number of gold atoms in 4 moles (note: do not calculate the final value here, just set up the expression).