Then you also found that 1 cubic micron = 1x10^ -18 metersI thought I found how many cubic microns were in 1 cubic meter. Why aren't those the units that i'm using?
If you use it in microns wouldn't
m = (2500kg/m3)*1x1018microns3
be in units of kg*micron3/m3
On the other hand:
m = (2500kg/m3)*1x10-18m3
the m3 cancels out in numerator and denominator leaving kg behind.