ok say swim has some 100% pure benzene, what is the molarity of this?
how does 1 work out the molarity of a pure substance knowing only the number of moles present?
swim only knows the following calcs:
Moles= mass(g)/molar mass
Moles= volume(dm^3) x moles/dm^3
this leaves swim with 2 unknowns (if swim only knows how many moles are present)