Question

after sample a0106 was retrieved from the asteroid ryugu, a portion of it was subjected to an extraction protocol in which small amounts of pulverized material were rinsed, sequentially, with hexane, dichloromethane, methanol, and finally a mixture of dichloromethane and methanol. each rinse created a separate extract suitable for spectral analysis. based on the table, both alkane and dimethyl sulfide compounds must have been present in the pulverized sample before the methanol - only extraction, because which choice uses data from the table to effectively complete the text? a the third extract in the sequence contains dimethyl sulfides and the fourth contains alkanes b the second extract in the sequence contains alkanes but no dimethyl sulfides c three of the four extracts contain alkanes but only one of the four contains dimethyl sulfides d the fourth extract in the sequence contains alkanes but no dimethyl sulfides

Explanation:

We need to analyze the presence - absence data of alkanes and dimethyl sulfides in each extract to answer the question. Hexane is the first rinse and is likely to extract non - polar alkanes well. Dichloromethane and methanol are subsequent solvents. By looking at the table data for the presence of alkanes and dimethyl sulfides in each extract, we can determine the correct answer.

Answer:

A. the third extract in the sequence contains dimethyl sulfides and the fourth contains alkanes