How many moles of steric acid are contained in 0.25 ml of a hexane solution containing 5.4 x 10^-4 g stearic acid/l?

Explanation:

The given data is as follows.

        Volume = 0.25 ml = = 0.00025 l

        mass =

Also, it is known that molar mass of stearic acid is 284.48 g/mol.

Therefore, calculate the mass present in 0.00025 l as follows.

            =

            = 13.5 g

As number of moles is mass divided by molar mass of the substance. Hence, calculate the number of moles of stearic acid as follows.

                No. of moles =

                                     =

                                     = 0.047 mol

Thus, we can conclude that there are 0.047 mol of steric acid are contained in the given solution.