17. Решение задачи по химии №001 799

145. Determine the mass fraction (%) of manganese in steel, if the following results were obtained during photometry using the method of three standards:
Parameter Reference Analyzed sample
1 2 3
ω(Mn), % 1.20 0.94 0.48 ?
ΔS 0.47 0.39 0.17 0.40

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