O ergosterol, um precursor da vitamina D, possui um λmáx = 282 nm e absortividade molar ϵ...
O ergosterol, um precursor da vitamina D, possui um λmáx = 282 nm e absortividade molar ϵ = 11.900. Qual é a concentração de ergosterol em uma solução cuja absorbância A = 0,065 com um caminho óptico l = 1,00 cm?
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