If an object weighs 2.7 kg and has a volume of 270 mL, what is the density of this object?
Let's use the equation below to answer this question:
We have the volume and mass, but the mass doesn't have the appropriate unit associated with it. To go from kilograms to grams we have to use the following relationship:
Multiply 2.7 kg by 1000 like this:
Now, just plug your known values into the equation and solve for density:
Thus, that object has a density of 10. g/mL