90. Gas mixtures contain ethanol and methanol vapors. Determine the degree of separation of these compounds (R) in different chromatograms. The shape of the peaks is close to the normal distribution curve. Peak characteristics are presented in the table:

Mixture N Methanol peak Ethanol peak
retention time peak width retention time peak width
1 225 19 250 21
2210 18 270 25
3 214 19 280 30

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