Percent By Mass
What is Percent By Mass?
Percent by mass (mass percent) is a concentration unit expressing the mass of a solute as a percentage of the total mass of the solution, calculated as (mass of solute / mass of solution) × 100%. It is a dimensionless quantity independent of temperature and is commonly used on product labels and in industrial formulations. For example, a 35% hydrochloric acid solution contains 35 g of HCl per 100 g of solution.
Key Facts
Frequently Asked Questions
Percent by mass (mass percent) is a concentration unit expressing the mass of a solute as a percentage of the total mass of the solution, calculated as (mass of solute / mass of solution) × 100%. It is a dimensionless quantity independent of temperature and is commonly used on product labels and in industrial formulations. For example, a 35% hydrochloric acid solution contains 35 g of HCl per 100 g of solution.