10.) 69% of all copper atoms are Cu-63. How many times more massive than an atom of C-12 is an atom this copper isotope?

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it would be d. henry moseley

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and sorry if i'm late. have a good rest of your day! : d

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".