What is the concentration of a dextrose solution prepared by diluting 11 mL of a 5.0 M dextrose solution to 25 mL using a 25 mL volumetric flask?

Talc (french chalk) is the ingredient

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).