What could have accounted for a percent yield of less than 100% in this lab? check all that apply. - the copper chloride did not fully dissolve in water before performing the reaction. -the mass of the copper was not measured with the same accuracy. - not all of the copper was collected in the filter. -not enough time was allowed for all of the aluminum to react. -there were impurities in the aluminum.

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he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".