To find the moles of solute in the given solution, we need to use the formula:
Molarity (M) = moles of solute / volume of solution in liters
We can rearrange this formula to solve for the number of moles of solute:
moles of solute = Molarity x volume of solution in liters
First, we need to convert the given volume of solution from milliliters to liters:
148 mL = 0.148 L
Now, we can substitute the values into the formula:
moles of solute = 0.0068 mol/L x 0.148 L
moles of solute = 0.00101 mol
Therefore, the number of moles of LiF in the given solution is 0.00101 mol.