What is the mass, in grams, of each elemental sample? 2.3 x 10-3 mol Sb b. 0.0355 mol Ba C. 43.9 mol Xe d. 1.3 mol W 86. What is the mass of 4.91 x 1021 platinum atoms? 88. Calculate the number of atoms in each sample. a. 14.955 g Cr b. 39.733 g s 12.899 g Pt d. 97.552 g Sn 90. Calculate the mass, in kg, of each sample. 7.55 x 1026 cadmium atoms a. b. 8.15 x 1027 nickel atoms 12 C. 1.22 x 1027 manganese atoms 5.48 x 1029 lithium atoms d