Molarity is denoted by (M) and it is defined as the number of moles of solute (n) divided by the volume (V) of the solution in liters. We must keep in mind that the molarity is defined as moles of solute per liter of solution, not moles of solute per liter of solvent. In stichiometric calculations molarity is a unit of concentration.
<h2>Part 2</h2><h3>Answer:</h3>
T<u>he right choice is </u><u>(3) 2.51 × 10−3 M</u>
Be careful on this one! Mass is always conserved, based on the law of conservation of mass. Since their was a change in state, we went from a solid to a gas, so, the weight would be lighter, not the mass.