The Relationship Between Mass, Volume & Density | Sciencing
Density is defined as mass per unit volume. d = mV. Example: A brick of salt measuring cm x cm x cm has a mass of g. Density is the mass per unit of volume of a substance. The density equation is: Density = MassVolume. To solve the equation for Mass. The students learned that the relationship between mass and volume is The numbers for volume and mass below will need to be modified based on your.
Both of these measurements are dependent on the amount of material. However, the relationship between mass and volume is constant for a substance at a given temperature and pressure. This relationship between the mass and the volume of a substance is given as density.
While changing the amount of substance alters mass and volume, the density of the material remains the same and is a physical property of the substance. Mass Mass measures how much material is present in a substance. The mass of a substance is often given in grams SI or pounds English. Scales are often employed to determine the mass of a substance since weight is a function of mass and gravity.
Density of Water | Chapter 3: Density | Middle School Chemistry
Since gravity is very nearly the same over the surface of the Earth, weight becomes a good indicator of mass. Increasing and decreasing the amount of material measured increases and decreases the mass of the substance. Volume Volume describes how much space a substance occupies and is given in liters SI or gallons English. The volume of a substance is determined by how much material is present and how closely the particles of the material are packed together.
Density of Water
As a result, temperature and pressure can greatly affect the volume of a substance, especially gases. As with mass, increasing and decreasing the amount of material also increases and decreases the volume of the substance. For example, 10 grams of freshwater has a volume of 10 milliliters. Unlike mass and volume, increasing the amount of material measured does not increase or decrease density.
How do you calculate mass using density and volume?
This makes density a useful property in identifying many substances. However, since volume deviates with changes in temperature and pressure, density can also change with temperature and pressure. Look at your values for density in your chart. Does the density of the different volumes of water seem to be about the same? One reason could be inaccuracies in measuring. Another reason is that the density of water changes with temperature. Have students graph their results. Help students make a graph of the data on their activity sheet.
The x-axis should be volume and the y-axis should be mass. When students plot their data, there should be a straight line showing that as volume increases, mass increases by the same amount. Discuss student observations, data, and graphs.
Use your graph to find the mass of 40 mL of water.
How are density mass and volume related? + Example
What is the density of this volume of water? The mass of 40 mL of water is 40 grams. Choose a volume between 1 and mL. Use your graph to find the mass.
Tell students that density is a characteristic property of a substance.
This means that the density of a substance is the same regardless of the size of the sample. Is density a characteristic property of water? How do you know?
Density is a characteristic property of water because the density of any sample of water at the same temperature is always the same. Explore Project the image Density of Water. Water molecules all have the same mass and size.