30. Решение задачки по химии №0270

144. Determine the mass fraction (%) of chromium in steel if the following results were obtained during photometry using the three standards method:
Parameter Reference Sample analyzed
1 2 3
ω(Cr), % 0.93 1.97 2.34 ?
ΔS 0.23 0.60 0.71 0.44

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