134. To build a calibration graph when determining the content of propyl alcohol in water, the following data were obtained on the refractometer scale:
Alcohol content, % 0 5 10 15 20 25 30
Refractometer reading 7.70 9.90 12.10 17.80 23.80 31.00 42.50
Build a calibration graph and determine the content of propyl alcohol, if the readings on the refractometer scale were:
task number 134
Reading on a scale of 13.98

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