Najpierw oblicz liczbę każdego atomu w CePrNdPmSmEuGdTbDyHoErTmYbLuThPaUNpPuAmCmBkCfEsFmMdNoLrRfSgW:
Ce: 1, Pr: 1, Nd: 1, Pm: 1, Sm: 1, Eu: 1, Gd: 1, Tb: 1, Dy: 1, Ho: 1, Er: 1, Tm: 1, Yb: 1, Lu: 1, Th: 1, Pa: 1, U: 1, Np: 1, Pu: 1, Am: 1, Cm: 1, Bk: 1, Cf: 1, Es: 1, Fm: 1, Md: 1, No: 1, Lr: 1, Rf: 1, Sg: 1, W: 1
Następnie wyszukaj masy atomowe każdego pierwiastka w układzie okresowym :
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, Ho: 164.93032, Er: 167.259, Tm: 168.93421, Yb: 173.054, Lu: 174.9668, Th: 232.03806, Pa: 231.03588, U: 238.02891, Np: 236.04657, Pu: 238.0495599, Am: 241.0568291, Cm: 243.0613891, Bk: 247.070307, Cf: 249.0748535, Es: 252.08298, Fm: 257.095105, Md: 258.098431, No: 259.10103, Lr: 262.10963, Rf: 265.1167, Sg: 271.13347, W: 183.84
Teraz oblicz sumę iloczynów liczby atomów do masy atomowej:
Masa molowa (CePrNdPmSmEuGdTbDyHoErTmYbLuThPaUNpPuAmCmBkCfEsFmMdNoLrRfSgW) = ∑ Counti * Weighti =
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(Ho) * Weight(Ho) + Count(Er) * Weight(Er) + Count(Tm) * Weight(Tm) + Count(Yb) * Weight(Yb) + Count(Lu) * Weight(Lu) + Count(Th) * Weight(Th) + Count(Pa) * Weight(Pa) + Count(U) * Weight(U) + Count(Np) * Weight(Np) + Count(Pu) * Weight(Pu) + Count(Am) * Weight(Am) + Count(Cm) * Weight(Cm) + Count(Bk) * Weight(Bk) + Count(Cf) * Weight(Cf) + Count(Es) * Weight(Es) + Count(Fm) * Weight(Fm) + Count(Md) * Weight(Md) + Count(No) * Weight(No) + Count(Lr) * Weight(Lr) + Count(Rf) * Weight(Rf) + Count(Sg) * Weight(Sg) + Count(W) * Weight(W) =
1 * 140.116 + 1 * 140.90765 + 1 * 144.242 + 1 * 144.912749 + 1 * 150.36 + 1 * 151.964 + 1 * 157.25 + 1 * 158.92535 + 1 * 162.5 + 1 * 164.93032 + 1 * 167.259 + 1 * 168.93421 + 1 * 173.054 + 1 * 174.9668 + 1 * 232.03806 + 1 * 231.03588 + 1 * 238.02891 + 1 * 236.04657 + 1 * 238.0495599 + 1 * 241.0568291 + 1 * 243.0613891 + 1 * 247.070307 + 1 * 249.0748535 + 1 * 252.08298 + 1 * 257.095105 + 1 * 258.098431 + 1 * 259.10103 + 1 * 262.10963 + 1 * 265.1167 + 1 * 271.13347 + 1 * 183.84 =
6364.3618 g/mol
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