まず、H16He4Li7Be5B7C65N6O4Ne7Na4Mg3Al1Si1P6S4Cl6Ar7K8Ca54Sc757 内の各原子の数を計算します。
H: 16, He: 4, Li: 7, Be: 5, B: 7, C: 65, N: 6, O: 4, Ne: 7, Na: 4, Mg: 3, Al: 1, Si: 1, P: 6, S: 4, Cl: 6, Ar: 7, K: 8, Ca: 54, Sc: 757
次に、周期表の各元素の原子量を調べます。
H: 1.00794, He: 4.002602, Li: 6.941, Be: 9.012182, B: 10.811, C: 12.0107, N: 14.0067, O: 15.9994, Ne: 20.1797, Na: 22.98976928, Mg: 24.305, Al: 26.9815386, Si: 28.0855, P: 30.973762, S: 32.065, Cl: 35.453, Ar: 39.948, K: 39.0983, Ca: 40.078, Sc: 44.955912
次に、原子数と原子量の積の合計を計算します。
モル質量 (H16He4Li7Be5B7C65N6O4Ne7Na4Mg3Al1Si1P6S4Cl6Ar7K8Ca54Sc757) = ∑ Counti * Weighti =
Count(H) * Weight(H) + Count(He) * Weight(He) + Count(Li) * Weight(Li) + Count(Be) * Weight(Be) + Count(B) * Weight(B) + Count(C) * Weight(C) + Count(N) * Weight(N) + Count(O) * Weight(O) + Count(Ne) * Weight(Ne) + Count(Na) * Weight(Na) + Count(Mg) * Weight(Mg) + Count(Al) * Weight(Al) + Count(Si) * Weight(Si) + Count(P) * Weight(P) + Count(S) * Weight(S) + Count(Cl) * Weight(Cl) + Count(Ar) * Weight(Ar) + Count(K) * Weight(K) + Count(Ca) * Weight(Ca) + Count(Sc) * Weight(Sc) =
16 * 1.00794 + 4 * 4.002602 + 7 * 6.941 + 5 * 9.012182 + 7 * 10.811 + 65 * 12.0107 + 6 * 14.0067 + 4 * 15.9994 + 7 * 20.1797 + 4 * 22.98976928 + 3 * 24.305 + 1 * 26.9815386 + 1 * 28.0855 + 6 * 30.973762 + 4 * 32.065 + 6 * 35.453 + 7 * 39.948 + 8 * 39.0983 + 54 * 40.078 + 757 * 44.955912 =
38806.4750 g/mol
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