An extraction procedure specifies that an aqueous solution containing dissolved organic material be extracted twice with 10-ml portions of diethyl ether. a student removes the lower layer after the first extraction and adds the second 10-ml portion of ether to the upper layer remaining in the separatory funnel. after shaking the funnel, the student observes only one liquid phase with no interface. explain.

Which type of stress results when two plates push against one another? a. compression b. tension c. force d. shear

Which statements are true concerning mineral formation? check all that apply. the slower the cooling, the larger the crystals. the faster the cooling, the smaller the crystals. crystals formed from magma are smaller than crystals formed from lava. minerals can only form in solutions when the solution is heated deep underground. when a solution cools, elements and compounds leave the solution and crystallize as minerals. minerals formed from hot water solutions can form narrow channels in the surrounding rock.

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o