How many moles of silver atoms are present in 1.8 × 10^{20} atoms of silver (Ag)?

• A. 1.8 × 10^{-2} mol
• B. 1.1 × 10^{-3} mol
• C. 6.0 × 10^{-5} mol
• D. 3.0 × 10^{-4} mol

Answer: (D)

Verified step by step guidance

1. Identify the given quantity: 1.8 \times 10^{20} atoms of silver (Ag).
2. Recall that 1 mole of any substance contains Avogadro's number of particles, which is approximately 6.022 \times 10^{23} atoms/mol.
3. Set up the conversion from atoms to moles using the relationship: moles = \frac{\text{number of atoms}}{\text{Avogadro's number}}.
4. Substitute the given values into the formula: moles = \frac{1.8 \times 10^{20}}{6.022 \times 10^{23}}.
5. Perform the division to find the number of moles of silver atoms present (do not calculate the final value here).