まず、F3Te3H37Hg2Mg3I2K3W3Rb3Xe3S2B3N3Y6Fr2V3OsAl2Li2He25 内の各原子の数を計算します。
F: 3, Te: 3, H: 37, Hg: 2, Mg: 3, I: 2, K: 3, W: 3, Rb: 3, Xe: 3, S: 2, B: 3, N: 3, Y: 6, Fr: 2, V: 3, Os: 1, Al: 2, Li: 2, He: 25
次に、周期表の各元素の原子量を調べます。
F: 18.9984032, Te: 127.6, H: 1.00794, Hg: 200.59, Mg: 24.305, I: 126.90447, K: 39.0983, W: 183.84, Rb: 85.4678, Xe: 131.293, S: 32.065, B: 10.811, N: 14.0067, Y: 88.90585, Fr: 223.0197359, V: 50.9415, Os: 190.23, Al: 26.9815386, Li: 6.941, He: 4.002602
次に、原子数と原子量の積の合計を計算します。
モル質量 (F3Te3H37Hg2Mg3I2K3W3Rb3Xe3S2B3N3Y6Fr2V3OsAl2Li2He25) = ∑ Counti * Weighti =
Count(F) * Weight(F) + Count(Te) * Weight(Te) + Count(H) * Weight(H) + Count(Hg) * Weight(Hg) + Count(Mg) * Weight(Mg) + Count(I) * Weight(I) + Count(K) * Weight(K) + Count(W) * Weight(W) + Count(Rb) * Weight(Rb) + Count(Xe) * Weight(Xe) + Count(S) * Weight(S) + Count(B) * Weight(B) + Count(N) * Weight(N) + Count(Y) * Weight(Y) + Count(Fr) * Weight(Fr) + Count(V) * Weight(V) + Count(Os) * Weight(Os) + Count(Al) * Weight(Al) + Count(Li) * Weight(Li) + Count(He) * Weight(He) =
3 * 18.9984032 + 3 * 127.6 + 37 * 1.00794 + 2 * 200.59 + 3 * 24.305 + 2 * 126.90447 + 3 * 39.0983 + 3 * 183.84 + 3 * 85.4678 + 3 * 131.293 + 2 * 32.065 + 3 * 10.811 + 3 * 14.0067 + 6 * 88.90585 + 2 * 223.0197359 + 3 * 50.9415 + 1 * 190.23 + 2 * 26.9815386 + 2 * 6.941 + 25 * 4.002602 =
4153.1125 g/mol
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