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### The Question:
You are asked to compare the concentration of salt solutions prepared by **Scientist A** and **Scientist B**, using equivalent measures from the table provided (customary and metric units).

### Information Given:
1. **Scientist A:**
   - Dissolved **1.0 kilogram of salt** in **3.0 liters** of water.
   
2. **Scientist B:**
   - Dissolved **1.0 pound of salt** in **7.0 pints** of water.

### Unit Conversions from the Table:
- 1 kilogram (kg) = 2.20 pounds (lb)
- 1 liter (L) = 2.11 pints (pt)

### Step-by-Step Solution:

#### **Scientist A:**
- Salt dissolved: **1.0 kg** (no need to convert here).
- Volume of water: **3.0 liters**.
  - In terms of pints, 3.0 L = \( 3.0 \times 2.11 = 6.33 \) pints.

- Concentration of Scientist A:
  \[
  \text{Concentration A} = \frac{\text{mass of salt}}{\text{volume of water}} = \frac{1.0 \text{ kg}}{3.0 \text{ L}} = 0.33 \, \text{kg/L}.
  \]
  In terms of pints:
  \[
  \text{Concentration A in pints} = \frac{1.0 \text{ kg}}{6.33 \text{ pints}} = 0.158 \, \text{kg/pint}.
  \]

#### **Scientist B:**
- Salt dissolved: **1.0 pound**.
  - Convert to kilograms: \( 1.0 \text{ pound} \div 2.20 = 0.454 \text{ kg} \).
  
- Volume of water: **7.0 pints** (no need to convert here).

- Concentration of Scientist B:
  \[
  \text{Concentration B} = \frac{0.454 \text{ kg}}{7.0 \text{ pints}} = 0.065 \, \text{kg/pint}.
  \]

### Comparison:
- **Scientist A’s concentration** = 0.158 kg/pint.
- **Scientist B’s concentration** = 0.065 kg/pint.

### Mistake:
It looks like you calculated the concentration for **Scientist A** correctly as **0.33 kg/L**, but for **Scientist B**, the conversion might have been incorrect or not fully understood.

- **Scientist A** has a higher concentration when measured both in **kg/L** and **kg/pint**. Therefore, **Scientist A** made the more concentrated salt solution.

### To Correct the Answer:
- Clearly mention that **Scientist A's concentration** (0.158 kg/pint) is higher than **Scientist B's concentration** (0.065 kg/pint).
- Therefore, **Scientist A** made the more concentrated solution.

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Would you like more details on any part of the solution? Here are 5 related questions you could explore further:

1. How do we convert between kilograms and pounds?
2. Why is it important to use equivalent units when comparing concentrations?
3. How can I express concentration in different units (e.g., kg/L vs kg/pint)?
4. How does volume affect the concentration of a solution?
5. Can this method of comparison be applied to other types of solutions, such as sugar water?

### Tip:
Always ensure units are consistent when comparing concentrations or any similar quantities.

Scientist A dissolved 1.0 kilogram of salt in 3.0 liters of water. Scientist B dissolved 1.0 pounds of salt in 7.0 pints of water. Which scientist made a more concentrated salt solution?

Compare the concentrations of salt solutions prepared by Scientist A and Scientist B using unit conversions. Learn how to calculate concentration in both kilograms per liter and kilograms per pint, and understand why Scientist A made a more concentrated solution.

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