まず、H2O3HePSi3BY4Os2UN3Li2ClS8W2SeKr3Tm2Fm4I2AlAu5Sb6Pb3 内の各原子の数を計算します。
H: 2, O: 3, He: 1, P: 1, Si: 3, B: 1, Y: 4, Os: 2, U: 1, N: 3, Li: 2, Cl: 1, S: 8, W: 2, Se: 1, Kr: 3, Tm: 2, Fm: 4, I: 2, Al: 1, Au: 5, Sb: 6, Pb: 3
次に、周期表の各元素の原子量を調べます。
H: 1.00794, O: 15.9994, He: 4.002602, P: 30.973762, Si: 28.0855, B: 10.811, Y: 88.90585, Os: 190.23, U: 238.02891, N: 14.0067, Li: 6.941, Cl: 35.453, S: 32.065, W: 183.84, Se: 78.96, Kr: 83.798, Tm: 168.93421, Fm: 257.095105, I: 126.90447, Al: 26.9815386, Au: 196.966569, Sb: 121.76, Pb: 207.2
次に、原子数と原子量の積の合計を計算します。
モル質量 (H2O3HePSi3BY4Os2UN3Li2ClS8W2SeKr3Tm2Fm4I2AlAu5Sb6Pb3) = ∑ Counti * Weighti =
Count(H) * Weight(H) + Count(O) * Weight(O) + Count(He) * Weight(He) + Count(P) * Weight(P) + Count(Si) * Weight(Si) + Count(B) * Weight(B) + Count(Y) * Weight(Y) + Count(Os) * Weight(Os) + Count(U) * Weight(U) + Count(N) * Weight(N) + Count(Li) * Weight(Li) + Count(Cl) * Weight(Cl) + Count(S) * Weight(S) + Count(W) * Weight(W) + Count(Se) * Weight(Se) + Count(Kr) * Weight(Kr) + Count(Tm) * Weight(Tm) + Count(Fm) * Weight(Fm) + Count(I) * Weight(I) + Count(Al) * Weight(Al) + Count(Au) * Weight(Au) + Count(Sb) * Weight(Sb) + Count(Pb) * Weight(Pb) =
2 * 1.00794 + 3 * 15.9994 + 1 * 4.002602 + 1 * 30.973762 + 3 * 28.0855 + 1 * 10.811 + 4 * 88.90585 + 2 * 190.23 + 1 * 238.02891 + 3 * 14.0067 + 2 * 6.941 + 1 * 35.453 + 8 * 32.065 + 2 * 183.84 + 1 * 78.96 + 3 * 83.798 + 2 * 168.93421 + 4 * 257.095105 + 2 * 126.90447 + 1 * 26.9815386 + 5 * 196.966569 + 6 * 121.76 + 3 * 207.2 =
6184.1115 g/mol
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