gWhat is the concentration of a solution made by diluting 5.0 mL of a 3.2 M glucose solution by adding enough water to make a 40.0 mL solution

0.4 M

Explanation:

To solve this problem first we calculate the number of glucose moles, using the first volume and concentration:

This number of moles remains the same throughout the dilution process. So we can now calculate the concentration of the second solution, dividing the number of moles by the second volume:

the answer to this question is 3.