A chemist prepares a solution of magnesium fluoride (MgF₂)

Last updated: 8/4/2022

A chemist prepares a solution of magnesium fluoride (MgF₂) by measuring out 0.00399 μmol of magnesium fluoride into a 100. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mmol/L of the chemist's magnesium fluoride solution. Round your answer to 3 significant digits.