Aplatinum wedding band contains 0.077 mol of platinum. how many atoms of platinum are in the 15-gram platinum wedding band? a) 3.09 x 1021 atoms b) 4.64 x 1022 atoms c) 7.82 x 1024 atoms d) 1.17 x 1026 atoms

How does carbon monoxide pose the greatest threat to humans? a. it can be produced by wood fires. b. it can be produced by home furnaces. c. it is produced by acid rain. d. it is produced by modern automobiles.