A student is asked to make 500 mL of a buffer solution for an upcoming laboratory investigation that requires 50.0 mL of 3.0 M phosphoric acid. The student searches the acid cabinet in the stockroom but can only find 4.5 M phosphoric acid. Calculate the amount of 4.5 M phosphoric acid the student should dilute to a total volume of 500 mL. Give our answer to the nearest tenth of a mL.
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