39. Решение задачки по химии №15

3. When determining Co in steel using the 3-standard method at the AES, the following data were obtained:

СCo, % 0.4 0.54 1.08 x
SCo 0.79 0.98 1.36 1.12
SFe 0.63 0.6 0.65 0.66
Determine the percentage content of cobalt in the sample.

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