What is the density of the substance of it has a volume of 25ml and mass of 20.5g ?

820 kilogram/cubic meter

Explanation:

ρ =  m/V

=  20.5 gram/25 milliliter

=  0.82 gram/milliliter

=  820 kilogram/cubic meter

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".