The density of a certain material is such that it weighs *7 pounds per gallon* of volume. Express this density in kilograms per quart. Round your answer *to the nearest hundredth*.

To convert the density from pounds per gallon to kilograms per quart, we'll go through the following steps:

1. **Identify the given density**:
   \[
   \text{Density} = 7 \, \text{pounds/gallon}
   \]

2. **Convert pounds to kilograms**:
   \[
   1 \, \text{pound} = 0.453592 \, \text{kilograms}
   \]
   So,
   \[
   7 \, \text{pounds} = 7 \times 0.453592 \, \text{kilograms}
   \]

3. **Convert gallons to quarts**:
   \[
   1 \, \text{gallon} = 4 \, \text{quarts}
   \]

4. **Calculate the density in kilograms per quart**:
   \[
   \text{Density in kilograms per quart} = \frac{7 \times 0.453592 \, \text{kilograms}}{4 \, \text{quarts}}
   \]

Let's calculate that.The density of the material is approximately **0.79 kilograms per quart**, rounded to the nearest hundredth.

Would you like more details or have any questions? Here are some related questions:

1. How would you convert density from kilograms per quart to grams per liter?
2. What is the density in pounds per cubic foot if the original density is 7 pounds per gallon?
3. How many liters are there in a gallon, and how would that affect density conversion?
4. Why do we use different units like quarts, gallons, and liters, and when are they most commonly used?
5. What is the impact of temperature on the density of materials?
6. How would you convert density from kilograms per quart to milligrams per milliliter?
7. How does the density of a material influence its use in industry?
8. Can density be used to identify a material? If so, how?

**Tip**: When converting units, breaking down each step and performing conversions systematically helps prevent errors.

Learn how to convert density from pounds per gallon to kilograms per quart with a step-by-step solution. Understand the units involved and the conversion factors used. Suitable for high school students and anyone interested in unit conversions and density calculations.

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