The three aqueous ionic solutions below have total volumes of 25.0 ml for A, 50.0 ml for B, and 100.0 ml for C (all at 25°C). If each sphere represents 0.010 mol of ions, calculate: 1. the total molarity of ions for each solution
2. the lowest molarity of solute
3. Which solution has the highest osmotic pressure?

See the picture attached.

My answers:
1.
A. 3.2
B. 2
C. 1.2
2. 0.4
3. A

Am I right?