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QUESTION

# How do you calculate mass using density and volume?

In order to find mass when you have and volume, you use the relationship

"Density" = "Mass"/"Volume"

You multiply both sides of the equation by the volume and get:

"Mass " = " Volume × Density"

Here are two example calculations:

Example 1

A piece of aluminum has a volume of "6.0 cm"^3 and a density of "2.70 g/cm"^3. What is its mass?

Solution

"Mass" = 6.0 cancel("cm"^3) × "2.70 g"/(1 cancel("cm"^3)) = "16.2 g"

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Example 2

Calculate the mass of "30.0 mL" of methanol, if the density of methanol is "0.790 g/mL".

Solution

"Mass" = 30.0 cancel("mL") × "0.790 g"/(1 cancel("mL")) = "23.7 g"