When iron is added to HCl, 720 cm3 of hydrogen is produced. What is the mass of iron used? Fe(s) + 2HCl(aq) → FeCl2(aq) + H2 (g)

c (diamond),

sio2 (quartz)

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".

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