3. Решение задачи по химии №000 392

147. Determine the mass fraction (%) of chromium in steel, if the following results were obtained during photometry using the method of three standards:
Parameter Reference Analyzed sample
1 2 3
ω(Cr), % 0.93 1.97 2.34
∆S 0.23 0.60 0.71 0.39

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