Magnesium has 3 naturally occurring isotopes: mg (23.985 amu) with 78.99% abundance,
2 mg (24.986 amu) with 10.00% abundance, and a third with 11.01% abundance.
look up the atomic weight of magnesium, and then calculate the mass of the third isotope,

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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