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milvs81
2.3 L is the correct answer, plz lemme know if you want to know how to solve this

Good Luck!
To prepare a solution from different concentration stock, you need to make the content/mass of solute equal. The content is calculated by multiplying the concentration with the volume used.
The calculation would be:

content1= content2
V1 * M1= V2 * M2
V1 * 2.5M= 3.8L * 1.5 M
V1= 5.7/2.5= 2.28L = 2.3L

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