141. Solving a chemistry problem
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Product description
In a sample of an organic compound weighing m g, oxygen was quantitatively converted to CO2. The carbohydrate dioxide was dissolved in an electrolytic cell filled with a dilute alkali solution, and dNx was determined - a decrease in the electrical conductivity of the absorption solution
The same transformations were carried out with standard substances containing from 200 to 1000 μg of oxygen, and the corresponding values of dNx were measured. The measurement results are presented below:
Oxygen content in the sample, μg 200 400 600 800 1000
dNx * 10 ^ 6, cm 80 150 220 285 355
Construct a calibration graph and calculate the mass fraction (%) of oxygen in an organic compound using the following data:
Option 1
m, mg 2.299
dNx * 10 ^ 6, cm 300
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