[Joules23]

A 1.37 g sample of a mixture of cyclohexane (C6H12) and naphthalene (C10H8) is dissolved in 17.4 g of benzene (C6H6). The freezing point of the solution is 2.2°C. Calculate the mass percent of the mixture. (See Table 12.2 for constants.)
cyclohexane
%
napthalene
%



What i did so far:
DeltaT=kf (m)
3.3=(5.12)(m)
m=.645mol mix/1000g Benzene

Where do i go from there?

[Yggdrasil]

So, you calculated that there are 0.645 mol of dissolved substances per 1000g of benzene.  How many moles of dissolved substances are in you 17.4g of benzene.  Given that the mass of the dissolved substances is 1.37g, can you calculate the amount of cyclohexane and napthalene?