Question

A chemist prepares a solution of magnesium fluoride (MgF2) by measuring out 0.0199 umol of magnesium fluoride into a 250. 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.

Answer 1

Step-by-step explanation:

There is .0199 micromole in 250 ml

.0199 micromole / 250 ml = 7.96 x 10^-5 micromole/ ml

or change the units to 7.96 x 10^-2 umole/L

which is 7.96 x 10^-5 mmole/ L