What is the molarity of a HCl solution if 45.5 L were used to react with 18.6 grams of
Na2CO3?
2 HCl + Na2CO3 → 2 NaCl + H2O + CO2
The molar mass of Na2CO3 is 106 g/mol and
the molar mass of HCl is 36.5 g/mol.

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".

answer: they produce more slow than unicellular organisms.