Concentration of solutions?

Question

A solution is made containing 25.5 g phenol (C6H5OH) in 495 g ethanol (CH3CH2OH). Calulate the following:

the mole fraction of phenol

the mass percent of phenol

the molarity of phenol

Answer 1

moles of phenol = 25.5/94
moles of ethanol = 495/46
mole fracn of phenol = moles of phenol/total moles present

mass percent = 25.5/495 *100 (this is by mass)

molarity can be found only if density are provided