63. Sewage sludge is applied as a fertilizer to agricultural land. The heavy metal cadmium, Cd, is often found in small amounts within this fertilizer. How many moles of cadmium is 2.62 × 1023 atoms of cadmium?
A 0.262 mol Cd
B 0.435 mol Cd
C 3.4 × 1023 mol Cd
D 6.02 × 1023 mol Cd
