Primeiro, calcule o número de cada átomo em FeCSiMgCeMnNiPCrSXeKrTiAuAgNeHONHgPuUIPtNaKWCaZnMoNbSnPbGePd:
Fe: 1, C: 1, Si: 1, Mg: 1, Ce: 1, Mn: 1, Ni: 1, P: 1, Cr: 1, S: 1, Xe: 1, Kr: 1, Ti: 1, Au: 1, Ag: 1, Ne: 1, H: 1, O: 1, N: 1, Hg: 1, Pu: 1, U: 1, I: 1, Pt: 1, Na: 1, K: 1, W: 1, Ca: 1, Zn: 1, Mo: 1, Nb: 1, Sn: 1, Pb: 1, Ge: 1, Pd: 1
Em seguida, pesquise os pesos atômicos para cada elemento da tabela periódica :
Fe: 55.845, C: 12.0107, Si: 28.0855, Mg: 24.305, Ce: 140.116, Mn: 54.938045, Ni: 58.6934, P: 30.973762, Cr: 51.9961, S: 32.065, Xe: 131.293, Kr: 83.798, Ti: 47.867, Au: 196.966569, Ag: 107.8682, Ne: 20.1797, H: 1.00794, O: 15.9994, N: 14.0067, Hg: 200.59, Pu: 238.0495599, U: 238.02891, I: 126.90447, Pt: 195.084, Na: 22.98976928, K: 39.0983, W: 183.84, Ca: 40.078, Zn: 65.38, Mo: 95.96, Nb: 92.90638, Sn: 118.71, Pb: 207.2, Ge: 72.64, Pd: 106.42
Agora, calcule a soma dos produtos do número de átomos pelo peso atômico:
Massa molar (FeCSiMgCeMnNiPCrSXeKrTiAuAgNeHONHgPuUIPtNaKWCaZnMoNbSnPbGePd) = ∑ Counti * Weighti =
Count(Fe) * Weight(Fe) + Count(C) * Weight(C) + Count(Si) * Weight(Si) + Count(Mg) * Weight(Mg) + Count(Ce) * Weight(Ce) + Count(Mn) * Weight(Mn) + Count(Ni) * Weight(Ni) + Count(P) * Weight(P) + Count(Cr) * Weight(Cr) + Count(S) * Weight(S) + Count(Xe) * Weight(Xe) + Count(Kr) * Weight(Kr) + Count(Ti) * Weight(Ti) + Count(Au) * Weight(Au) + Count(Ag) * Weight(Ag) + Count(Ne) * Weight(Ne) + Count(H) * Weight(H) + Count(O) * Weight(O) + Count(N) * Weight(N) + Count(Hg) * Weight(Hg) + Count(Pu) * Weight(Pu) + Count(U) * Weight(U) + Count(I) * Weight(I) + Count(Pt) * Weight(Pt) + Count(Na) * Weight(Na) + Count(K) * Weight(K) + Count(W) * Weight(W) + Count(Ca) * Weight(Ca) + Count(Zn) * Weight(Zn) + Count(Mo) * Weight(Mo) + Count(Nb) * Weight(Nb) + Count(Sn) * Weight(Sn) + Count(Pb) * Weight(Pb) + Count(Ge) * Weight(Ge) + Count(Pd) * Weight(Pd) =
1 * 55.845 + 1 * 12.0107 + 1 * 28.0855 + 1 * 24.305 + 1 * 140.116 + 1 * 54.938045 + 1 * 58.6934 + 1 * 30.973762 + 1 * 51.9961 + 1 * 32.065 + 1 * 131.293 + 1 * 83.798 + 1 * 47.867 + 1 * 196.966569 + 1 * 107.8682 + 1 * 20.1797 + 1 * 1.00794 + 1 * 15.9994 + 1 * 14.0067 + 1 * 200.59 + 1 * 238.0495599 + 1 * 238.02891 + 1 * 126.90447 + 1 * 195.084 + 1 * 22.98976928 + 1 * 39.0983 + 1 * 183.84 + 1 * 40.078 + 1 * 65.38 + 1 * 95.96 + 1 * 92.90638 + 1 * 118.71 + 1 * 207.2 + 1 * 72.64 + 1 * 106.42 =
3151.8944 g/mol
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