Correct Answer: 2.6 g of solute in 2 ml of solution
Explanation:
A concentrated solution will contain the most solute molecules per solvent molecules.
Here in the given options,
1) 6/10 = 0.6
2) 20.5/50 = 0.41
3) 30/120 = 0.25
4) 2.6/2 = 1.3
Hence, option D) is most concentrated.
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