Answer:
0.15 M
Step-by-step explanation:
To calculate the molarity of a solution, we need to know the number of moles of the solute (HF) and the volume of the solution (9 L).
The number of moles of HF can be calculated using its molar mass, which is:
molar mass of HF = 1.008 + 18.998 = 20.006 g/mol
Number of moles of HF = mass of HF / molar mass of HF
Number of moles of HF = 27 g / 20.006 g/mol
Number of moles of HF = 1.349 mol
Now that we know the number of moles of HF, we can calculate the molarity of the solution using the formula:
Molarity = Number of moles of solute / Volume of solution in liters
Molarity = 1.349 mol / 9 L
Molarity = 0.15 M (rounded to two decimal places)
Therefore, the molarity of the solution is 0.15 M.