Step 1
A solution is made up of a solute and a solvent
Solute = ammonia = NH3
Solvent = water = H2O
-----------
Step 2
Information provided:
The mass of NH3 = 152 g
The volume of the solution = 2.75 L
Information needed:
The molar mass of NH3 = 17.0 g/mol
----------
Step 3
Molarity (mol/L or M) = moles of NH3/volume of the solution (L)
Moles of NH3 = mass of NH3/molar mass NH3 = 152 g/17.0 g/mol = 8.94 moles
Therefore, Molarity = 8.94 moles/2.75 L = 3.25 mol/L
Answer: Molarity = 3.25 mol/L