5.3. To build a calibration graph, polarograms of four standard solutions of copper (II) were recorded and the wave height hx mm was measured:
Ссu*103, g/ml 0.50 1.00 1.50 2.00
hx, mm 9.0 17.5 26.2 35.0
A sample of brass weighing t g was dissolved and the solution was diluted to 50.00 ml.
Calculate the mass fraction ω (%) of copper in the analyzed samples if the wave height on the polarograms turned out to be equal to hx:
Option 10
t, g 0.1000
hx, mm 18.0

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