137. Solving a chemistry problem
When determining tin in bronze by the nuclear power plant method, the following data were obtained to construct a calibration graph: the mass fraction w (Sn) = 10.2% corresponded to ΔS = 0, the mass fraction w (Sn) = 5.2% corresponded to ΔS = -0.52. Construct a calibration graph and determine the mass fraction (%) of tin in the test sample, if ΔSх = -0.28.
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