Answer
Molarity of the NaOH solution = 9.963 M
Explanation
Given:
Volume of NaOH = 200 mL
molecules of NaOH = 1.2x10^24
Required: Molarity of NaOH
Solution:
Step 1: Find the number of moles of NaOH
To go from molecules to moles, divide the number of molecules by avogadro's number.
n = 1.2x10^24/6.022x10^23
n = 1.992 mol
Step 2: Convert volume from mL to L
1 mL = 0.001 L
200 ml = 0.200 L
Step 3: Calculate the molarity
C = n/V where C is the concentration/molarity, n is the number of moles and V is the volume.
C = 1.992 mol/0.200 L
C = 9.963 M
