How do you know that the ibuprofen you buy in Germanhas the same percentage composition as the ibuprofen?
ibuprofen, C13H18O2, this is manufactured in michigan contains 75.69% by mass carbon, 8.80% hydrogen, and 15.51%oxygen. if you buy some ibuprofen for a headache while you are on vacation in Germany, how do you know that it has the same percentage composition as the ibuprofen you buy at home
I guess you really don't. Here we have the FDA that says the percent composition must be 80% or higher. In other countries they might be able to sell you stuff with lower percent composition. I know Canada goes as low as 75%.
system failure! unable to identify answer. Lo siento. Soon i will be able to answer your question with flying colors.