まず、La2Ce3Pr4Nd3Pm5Sm7Eu4Gd4Tb9Dy4HO9Er4Tm9YB3Lu7Ac3Th4U4NP5 内の各原子の数を計算します。
La: 2, Ce: 3, Pr: 4, Nd: 3, Pm: 5, Sm: 7, Eu: 4, Gd: 4, Tb: 9, Dy: 4, H: 1, O: 9, Er: 4, Tm: 9, Y: 1, B: 3, Lu: 7, Ac: 3, Th: 4, U: 4, N: 1, P: 5
次に、周期表の各元素の原子量を調べます。
La: 138.90547, Ce: 140.116, Pr: 140.90765, Nd: 144.242, Pm: 144.912749, Sm: 150.36, Eu: 151.964, Gd: 157.25, Tb: 158.92535, Dy: 162.5, H: 1.00794, O: 15.9994, Er: 167.259, Tm: 168.93421, Y: 88.90585, B: 10.811, Lu: 174.9668, Ac: 227.0277521, Th: 232.03806, U: 238.02891, N: 14.0067, P: 30.973762
次に、原子数と原子量の積の合計を計算します。
モル質量 (La2Ce3Pr4Nd3Pm5Sm7Eu4Gd4Tb9Dy4HO9Er4Tm9YB3Lu7Ac3Th4U4NP5) = ∑ Counti * Weighti =
Count(La) * Weight(La) + Count(Ce) * Weight(Ce) + Count(Pr) * Weight(Pr) + Count(Nd) * Weight(Nd) + Count(Pm) * Weight(Pm) + Count(Sm) * Weight(Sm) + Count(Eu) * Weight(Eu) + Count(Gd) * Weight(Gd) + Count(Tb) * Weight(Tb) + Count(Dy) * Weight(Dy) + Count(H) * Weight(H) + Count(O) * Weight(O) + Count(Er) * Weight(Er) + Count(Tm) * Weight(Tm) + Count(Y) * Weight(Y) + Count(B) * Weight(B) + Count(Lu) * Weight(Lu) + Count(Ac) * Weight(Ac) + Count(Th) * Weight(Th) + Count(U) * Weight(U) + Count(N) * Weight(N) + Count(P) * Weight(P) =
2 * 138.90547 + 3 * 140.116 + 4 * 140.90765 + 3 * 144.242 + 5 * 144.912749 + 7 * 150.36 + 4 * 151.964 + 4 * 157.25 + 9 * 158.92535 + 4 * 162.5 + 1 * 1.00794 + 9 * 15.9994 + 4 * 167.259 + 9 * 168.93421 + 1 * 88.90585 + 3 * 10.811 + 7 * 174.9668 + 3 * 227.0277521 + 4 * 232.03806 + 4 * 238.02891 + 1 * 14.0067 + 5 * 30.973762 =
13199.5630 g/mol
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