fruitbag> You still haven't explained this, man. for the last time (07/06/07 | 23:38.38) <@brks> 20 / 152 ... NOT 152 / 20 BUT WHY, MAN! You aren't explainaing why 20 g isn't 1 mole 152 is 1 mole This doesn't make sense. it's the fucking mass Yes, but not for 1 mole. moles = *MASS* / rmm MASS of your sample Your equation is wrong. mass you have left