Answer:
(a) 1.5×10^23 atoms
(b) 7.47×10^23 atoms
(c) 3.98×10^22 atoms
(d) 4.93×10^23 atoms
Explanation:
Number of atoms = number of moles × 6.02×10^23
(a) 14.955 g Cr = (14.955/60) × 6.02×10^23 = 1.5×10^23 atoms
(b) 39.733 g S = (39.733/32) × 6.02×10^24 = 7.47×10^23 atoms
(c) 12.899 g Pt = (12.899/195) × 6.02×10^23 = 3.98×10^22 atoms
(d) 97.552 g Sn = (97.552/119) × 6.02×10^23 = 4.93×10^23 atoms
