If an IV is mixed so that each 150 mL contains 570. mg of the drug lidocaine, how
many minutes will it take for 800 mg of
lidocaine to be administered if the rate is set
at 9.0 mL/min?

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answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.