The density of a cork is 0.24 what is the volume of a 240 piece of cork?

I am going to assume that the volume 0.24 is in g/ml and that its mass 240 is in milligrams.
You first need to convert the milligrams into grams so that the units for mass and density both have grams in them. 240mg equals .240g

you have to divide its mass by the density to get volume.  (.240 g)/(0.24 g/ml)=1ml
I hope this helps.

Volume = Mass/Density

Mass = 240 gramsDensity = 0.24 grams/millilitersVolume = 240grams/0.24grams/milliliters = 1000 milliliters

I hope this helps

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.