A GC analysis of a oil containing the unknown diene produced a chromatogram with 3 distinct peaks. From the determination of peak area, you

Question

A GC analysis of a oil containing the unknown diene produced a chromatogram with 3 distinct peaks. From the determination of peak area, you find that the percent compositions represented by the peaks are: peak A is 26.66 percent, peak B is 60 percent, and peak C is 13.33 percent. If the largest peak in the chromatogram corresponds to the diene, how many moles of diene are in the crude oil

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Diễm Kiều 5 years 2021-08-18T20:32:16+00:00 1 Answers 16 views 0

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  1. minhkhue
    0
    2021-08-18T20:33:27+00:00
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    Answer:

    0.011 moles of diene are in the crude oil

    Explanation:

    The mass of the oil is 2.5g and the M.W. of the diene is 136g/mol

    The largest peak is the peak that has the higher percent concentration: That is the peak B with 60% by mass.

    Knowing this we can find the mass of the diene using its percentage and with the mass and the molecular weight we can find its moles:

    Mass Diene:

    2.5g Oil * (60g Diene / 100g Oil) = 1.5g Diene are in the oil

    Moles:

    1.5g Diene * (1mol / 136g) =

    0.011 moles of diene are in the crude oil

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