How To Find Mass of a Liquid From Density

Review how to calculate the mass of a liquid from its volume and density. Density is mass per unit volume: density mass / volume You can rewrite the equation to solve for mass: mass volume x density Density of liquids usually is expressed in units of g/ml. If you know the density of a liquid and the volume of the liquid, you can calculate its mass. Similarly, if you know the mass and volume of a liquid, you can calculate its density. Example Problem Calculate the mass of 30.0 ml of methanol, given the density of methanol is 0.790 g/ml. mass volume x densitymass 30 ml x 0.790 g/mlmass 23.7 g In real life, you can usually look up the density of commons liquids in reference books or online. While the calculation is simple, its important to cite answer using the correct number of significant digits.