Why aluminum in 1820 had more value than gold​

Aluminum had more value than gold in the 1820s, because it was harder to obtain. Hope this helped :)

im not exactly sure but i think its b!

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".