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The question shown in the image reads:

**"How many milliliters of water did the nurse add to create this new 5% peroxide mixture?"**

### Analysis of the Problem
- You are dealing with a concentration problem where a nurse dilutes a peroxide solution to create a mixture with 5% concentration.
- In the given solution, you have a total volume of 120 mL (the "new mixture").
- The aim is to determine the amount of water added to create a mixture that is only 5% peroxide.

### Solution Outline
1. **Original Information:**
   Let's assume the original concentration of the peroxide mixture is given in some previous part of the problem, or you have a known amount of peroxide that we want to dilute.

2. **New Mixture Details:**
   The final volume of the mixture is 120 mL, with a concentration of 5%. This means the amount of peroxide in the final solution should be:
   \[
   \text{Amount of peroxide} = 0.05 \times 120 = 6 \text{ mL}
   \]

3. **Determining Water Added:**
   To find the amount of water added, we need to subtract the initial amount of peroxide from the final mixture's total volume.

Would you like a detailed solution on how to work through this problem or if you have any other questions about it?

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**Relative Questions:**
1. How do you calculate the percentage of a solution in a mixture?
2. What is the formula for finding the amount of solute in a solution given the concentration?
3. How does adding water affect the concentration of a solution?
4. What are typical uses for diluted peroxide solutions in medical contexts?
5. How can you verify your results when working with percentages in mixtures?

**Tip:** Always double-check the units when working with volume and percentage calculations to avoid errors.

How many milliliters of water did the nurse add to create this new 5% peroxide mixture?

Learn how to calculate the amount of water a nurse added to dilute a peroxide mixture to 5% concentration, given a final volume of 120 mL. This problem covers key math concepts like percentage and volume calculations, suitable for Grade 6 students.

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