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Questions and Answers
A cube of copper weighing 63.54 g and the same sized cube of gold weighing 63.5 g have different densities.
A cube of copper weighing 63.54 g and the same sized cube of gold weighing 63.5 g have different densities.
True (A)
What is the actual density of pure water at 25 degrees Celsius?
What is the actual density of pure water at 25 degrees Celsius?
1.0 g/mL
How can you tell if a liquid is more or less dense than water?
How can you tell if a liquid is more or less dense than water?
If the density is over 1.0 g/mL, the substance is more dense than water and will sink. If under 1.0 g/mL, it will float.
What is the objective of this lab?
What is the objective of this lab?
How is density defined?
How is density defined?
What is water's density at 25 degrees Celsius and room temperature?
What is water's density at 25 degrees Celsius and room temperature?
How can mass and volume be found?
How can mass and volume be found?
What are the steps to determine the mass of a metal slug?
What are the steps to determine the mass of a metal slug?
How can you determine the density of a liquid?
How can you determine the density of a liquid?
What is the process for determining the density of a solid?
What is the process for determining the density of a solid?
What formula do you use to solve density problems?
What formula do you use to solve density problems?
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Study Notes
Density Overview
- Different materials, like copper and gold, can have the same weight but differing densities.
- The density of pure water at 25 degrees Celsius is 1.0 g/mL.
Density Comparison with Water
- Substances with density greater than 1.0 g/mL sink in water.
- Substances with density less than 1.0 g/mL float in water.
Experiment Objectives
- Learn to properly use a balance scale.
- Practice calculating the density of various materials through different methods.
Definition of Density
- Density is the mass of a material divided by its volume.
Water Density Values
- Water's density at 25 degrees Celsius is 1.0 g/mL.
- Water's density at room temperature is approximately 0.9970 g/mL.
Measuring Mass and Volume
- Mass is measured using a balance in grams.
- Volume is measured using a graduated cylinder.
Measuring Metal Slug Mass
- Use a balance to determine the mass of a metal slug after recording its identification number.
Liquid Density Determination
- Measure the mass of a graduated cylinder when empty and when containing an unknown liquid.
- Calculate the mass and volume of the liquid to find its density.
Solid Density Determination
- Record the mass of the unknown metal using a tared weigh boat.
- Measure the change in water volume after adding the metal to find the volume displaced and calculate density.
Density Calculation Formula
- Density can be calculated using the formula: D = m/v (Density = mass/volume).
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