Answer:
Option B is the right one 0.83M
Explanation:
Molarity = Moles of solute/liters of solution
You should calculate the molar mass of NaCl firstly.
Molar mass NaCl = Molar mass Na + Molar mass Cl
Molar mass NaCl = 23 g/m + 35.45 g/m
Molar mass NaCl = 58.45 g/m
To know the moles we should divide grams / molar mass
97 g/ 58.45 g/m = 1.66 moles
This moles are in 2L of solution.
Molarity = mol/L
1.66 moles/2L = 0.83M
