One of the most commonly used concentration units among chemists is the Molarity concentration term.
Molarity is defined as the moles of solute divided by the volume of the solution in liter units.
An alternative definition is the number of millimoles of solute divided by the volume of the solution in milliliters. For example, if we have a 3 M HCl solution, then we have 3 moles of HCl in every liter of that solution. Alternatively, we can say that we have 3 millimoles of HCl in every milliliter of solution. Calculate the Molarity of the resulting solution. Fill the flask up to the designated mark on the neck.