Determine The Density Of An Object That Has A Mass Of 149.8 G And Displaces 12.1 ML Of Water When Placed In A Graduated Cylinder.A. 8.08 G/mL B. 1.38 G/mL C. 12.4 G/mL D. 18.1 G/mL E. 11.4 G/mL

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Introduction

Density is a fundamental concept in chemistry that plays a crucial role in understanding various physical and chemical properties of substances. It is defined as the mass per unit volume of a substance. In this article, we will explore how to determine the density of an object using a simple experiment involving a graduated cylinder and water.

What is Density?

Density is a measure of how much mass is contained in a given volume of a substance. It is typically expressed in units of grams per milliliter (g/mL) or kilograms per liter (kg/L). The density of a substance is a characteristic property that can be used to identify it.

The Experiment

To determine the density of an object, we need to follow a simple experiment:

  1. Measure the mass of the object: Weigh the object using a balance or a digital scale to obtain its mass in grams (g).
  2. Measure the volume of the object: Place the object in a graduated cylinder and measure the volume of water displaced by the object. This is the volume of the object.
  3. Calculate the density: Use the formula density = mass / volume to calculate the density of the object.

Calculating the Density

Let's apply the formula to the given data:

  • Mass of the object = 149.8 g
  • Volume of the object = 12.1 mL

Using the formula density = mass / volume, we get:

density = 149.8 g / 12.1 mL = 12.4 g/mL

Conclusion

In this article, we have learned how to determine the density of an object using a simple experiment involving a graduated cylinder and water. By following the steps outlined above, we can calculate the density of an object and understand its physical and chemical properties.

Answer

The correct answer is C. 12.4 g/mL.

Why is Density Important?

Density is an important property of substances that can be used to identify them. It can also be used to predict the behavior of substances in various situations, such as:

  • Buoyancy: Density affects the buoyancy of objects in water. Objects with a density less than that of water will float, while objects with a density greater than that of water will sink.
  • Solubility: Density can affect the solubility of substances in water. Substances with a density close to that of water are more likely to be soluble.
  • Reactivity: Density can affect the reactivity of substances. Substances with a high density may be more reactive than those with a low density.

Real-World Applications

Density has numerous real-world applications, including:

  • Materials science: Density is an important property of materials that can be used to design and develop new materials with specific properties.
  • Chemical engineering: Density is used to design and optimize chemical processes, such as distillation and extraction.
  • Environmental science: Density is used to study the behavior of pollutants in the environment and to develop strategies for their removal.

Conclusion

Introduction

In our previous article, we explored how to determine the density of an object using a simple experiment involving a graduated cylinder and water. In this article, we will answer some frequently asked questions about density and provide additional information to help you better understand this concept.

Q: What is the difference between density and mass?

A: Density is a measure of how much mass is contained in a given volume of a substance, while mass is a measure of the amount of matter in an object. Density is typically expressed in units of grams per milliliter (g/mL) or kilograms per liter (kg/L), while mass is typically expressed in units of grams (g) or kilograms (kg).

Q: Why is density important in chemistry?

A: Density is an important property of substances that can be used to identify them. It can also be used to predict the behavior of substances in various situations, such as buoyancy, solubility, and reactivity.

Q: How do I measure the density of a substance?

A: To measure the density of a substance, you need to follow these steps:

  1. Measure the mass of the substance: Weigh the substance using a balance or a digital scale to obtain its mass in grams (g).
  2. Measure the volume of the substance: Place the substance in a graduated cylinder and measure the volume of water displaced by the substance. This is the volume of the substance.
  3. Calculate the density: Use the formula density = mass / volume to calculate the density of the substance.

Q: What are some common mistakes to avoid when measuring density?

A: Some common mistakes to avoid when measuring density include:

  • Using an inaccurate balance or digital scale: Make sure to use a balance or digital scale that is accurate to the nearest 0.1 g.
  • Not calibrating the graduated cylinder: Make sure to calibrate the graduated cylinder before using it to measure the volume of the substance.
  • Not accounting for the buoyancy of the substance: Make sure to account for the buoyancy of the substance when measuring its volume.

Q: How do I calculate the density of a substance if I only know its mass and volume?

A: To calculate the density of a substance if you only know its mass and volume, you can use the formula density = mass / volume.

Q: What are some real-world applications of density?

A: Density has numerous real-world applications, including:

  • Materials science: Density is an important property of materials that can be used to design and develop new materials with specific properties.
  • Chemical engineering: Density is used to design and optimize chemical processes, such as distillation and extraction.
  • Environmental science: Density is used to study the behavior of pollutants in the environment and to develop strategies for their removal.

Q: How do I convert the density of a substance from one unit to another?

A: To convert the density of a substance from one unit to another, you can use the following conversion factors:

  • Grams per milliliter (g/mL) to kilograms per liter (kg/L): 1 g/mL = 1 kg/L
  • Grams per milliliter (g/mL) to grams per cubic centimeter (g/cm³): 1 g/mL = 1 g/cm³

Conclusion

In conclusion, density is a fundamental concept in chemistry that plays a crucial role in understanding various physical and chemical properties of substances. By following the steps outlined above and avoiding common mistakes, you can accurately measure the density of a substance and understand its behavior in various situations.