How to calculate energy content and energy density

[cdiamond]

I need help! So I used the q=m*c*change in temp to find the energy in J, converted it into kJ and then divided it by the mass (in g) to find the energy content in kJ g^-1. Is that correct? After that, how would I find the energy density from the energy content in kJ L^-1?

[Srd2000]

Hey, you'd do the same if you were simply given the volume instead of mass. Instead of dividing by the mass to get the energy per gram....    or you can use the density of the work out the volume with a given mass. Because there's a lot of formulas and the actual maths isn't that hard, a nice little trick is to use the units to figure out an equation or a way to do the question.