determine the molarity of the following solution 31 g MgF2 in 55ml H20

To determine the molarity of the given solution, you need to calculate the amount of moles of the solute (MgF2) and divide it by the volume of the solution (in liters).

Step 1: Calculate the moles of MgF2.
To do this, you need to know the molar mass of MgF2 (magnesium fluoride). The molar mass of magnesium (Mg) is approximately 24.31 g/mol, and the molar mass of fluorine (F) is approximately 18.99 g/mol. Since there are two fluorine atoms in MgF2, the molar mass of MgF2 is:

Molar mass of MgF2 = (Molar mass of Mg) + (2 * Molar mass of F)
= 24.31 + (2 * 18.99)
= 24.31 + 37.98
= 62.29 g/mol

Now, calculate the moles of MgF2 using the given mass:
Moles of MgF2 = Mass of MgF2 / Molar mass of MgF2
= 31 g / 62.29 g/mol

Step 2: Convert the volume of the solution to liters.
The given volume is in milliliters, so you need to convert it to liters:
Volume in liters = 55 ml / 1000 ml/L
= 0.055 L

Step 3: Calculate the molarity.
Molarity (M) = Moles of solute / Volume of solution (in liters)
= Moles of MgF2 / Volume in liters
= (31 g / 62.29 g/mol) / 0.055 L

Now, you can simplify and calculate the molarity of the solution.