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What is the density of a liquid that has a volume of 20 mL and a mass of 3 g?
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1. Intro to General Chemistry
Density
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Which mathematical operation would you use to calculate the mass of an object if you know its density and volume?
A
Add the density and the volume
B
Subtract the volume from the density
C
Divide the density by the volume
D
Multiply the density by the volume
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Recall the relationship between mass, density, and volume, which is given by the formula: \(\text{mass} = \text{density} \times \text{volume}\).
Understand that density is defined as mass per unit volume, so multiplying density by volume will give the total mass.
Recognize that addition or subtraction of density and volume is not physically meaningful because they have different units.
Note that dividing density by volume does not yield mass; instead, it would give a quantity with units that do not correspond to mass.
Therefore, to find the mass when density and volume are known, multiply the density by the volume using the formula: \(m = \rho \times V\).
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