13.3 g of benzene (C6H6) is dissolved in 282 g of carbon tetrachloride. What is the molal concentration of benzene in this solution?

0.605 molal

Explanation:

molality is the amount of solute in a particular mass of solvent.

lets calculate the amount of benzene solute.

mass of benzene = 13.3g

molar mass of C6H6 = 12*6 + 1*6 = 72+7=78g/mol

amount of benzene = mass/molar mass

=13.3/78

=0.1705mol

molality = amount of solute/mass of solvent in kg

mass of solvent=282g=0.282kg

molality = 0.1705/0.282

=0.605 molal