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Solution:
To find the amount of ZNO needed to produce 15% of ZNO from a 10% solution, we can use the formula for mixing solutions:
Where:
We need to solve for V2. Rearranging the formula, we get:
Substituting the given values:
Therefore, 233.33g of ZNO should be added to produce 15% of ZNO from a 10% solution.