The content of normal butane and isobutane in a mixture with indifferent impurities was determined by absorption bands at 10.3 μm (absorbed only by n-butane) and at 8.5 μm (absorbed only by isobutane). The following data were obtained for standard mixtures:
Absorption at 10.3 μm, % 18.0 28.5 39.0 49.0 54.0
W(n-butane), % 18.0 36.0 58.0 79.0 92.0
Absorption at 8.5 μm, % 22.5 41.0 53.0 63.0 69.0
W(isobutane), % 15.0 42.0 61.0 83.0 95.0
Calculate the mass fraction (%) of n-butane and isobutane in the mixture if the following results were obtained for them under the same conditions:
Option 1
Absorption at 10.3 μm, % 20.0
Absorption at 8.5 μm % 60.0
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