If I want to know the molarity of solution is accurate, what information would I need to know?

Use density or specific gravity to get amount of acid (g) present in a given volume of solution. Then, simply use this formula to get the molarity of the solution. Molarity = (amount of acid in g per liter of solution)/(molecular weight).

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.