A Look at Density and How to Calculate It. The RATIO of the mass of a substance to the space it...
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Transcript of A Look at Density and How to Calculate It. The RATIO of the mass of a substance to the space it...
![Page 1: A Look at Density and How to Calculate It. The RATIO of the mass of a substance to the space it takes up (volume) Substances have a characteristic.](https://reader030.fdocuments.us/reader030/viewer/2022032801/56649dd95503460f94acf061/html5/thumbnails/1.jpg)
Density
A Look at Density and How to Calculate It
![Page 2: A Look at Density and How to Calculate It. The RATIO of the mass of a substance to the space it takes up (volume) Substances have a characteristic.](https://reader030.fdocuments.us/reader030/viewer/2022032801/56649dd95503460f94acf061/html5/thumbnails/2.jpg)
Definition of DENSITY: The RATIO of the mass of a substance to
the space it takes up (volume)
Substances have a characteristic density
Determined by how compact the atoms are inside
![Page 3: A Look at Density and How to Calculate It. The RATIO of the mass of a substance to the space it takes up (volume) Substances have a characteristic.](https://reader030.fdocuments.us/reader030/viewer/2022032801/56649dd95503460f94acf061/html5/thumbnails/3.jpg)
The maximum density of MOST materials occurs in the SOLID phase…
solids have high densitiesgases have low densities
![Page 4: A Look at Density and How to Calculate It. The RATIO of the mass of a substance to the space it takes up (volume) Substances have a characteristic.](https://reader030.fdocuments.us/reader030/viewer/2022032801/56649dd95503460f94acf061/html5/thumbnails/4.jpg)
![Page 5: A Look at Density and How to Calculate It. The RATIO of the mass of a substance to the space it takes up (volume) Substances have a characteristic.](https://reader030.fdocuments.us/reader030/viewer/2022032801/56649dd95503460f94acf061/html5/thumbnails/5.jpg)
Can you think of an exception to this rule?
![Page 6: A Look at Density and How to Calculate It. The RATIO of the mass of a substance to the space it takes up (volume) Substances have a characteristic.](https://reader030.fdocuments.us/reader030/viewer/2022032801/56649dd95503460f94acf061/html5/thumbnails/6.jpg)
![Page 7: A Look at Density and How to Calculate It. The RATIO of the mass of a substance to the space it takes up (volume) Substances have a characteristic.](https://reader030.fdocuments.us/reader030/viewer/2022032801/56649dd95503460f94acf061/html5/thumbnails/7.jpg)
What happens to the molecules in liquid water as water freezes?
![Page 8: A Look at Density and How to Calculate It. The RATIO of the mass of a substance to the space it takes up (volume) Substances have a characteristic.](https://reader030.fdocuments.us/reader030/viewer/2022032801/56649dd95503460f94acf061/html5/thumbnails/8.jpg)
Molecules move farther apart and EXPAND!
Ice (solid water) is LESS dense than liquid water
It floats in liquid water!
![Page 9: A Look at Density and How to Calculate It. The RATIO of the mass of a substance to the space it takes up (volume) Substances have a characteristic.](https://reader030.fdocuments.us/reader030/viewer/2022032801/56649dd95503460f94acf061/html5/thumbnails/9.jpg)
Will it Float? Density can
predict if something will float.
How?
![Page 10: A Look at Density and How to Calculate It. The RATIO of the mass of a substance to the space it takes up (volume) Substances have a characteristic.](https://reader030.fdocuments.us/reader030/viewer/2022032801/56649dd95503460f94acf061/html5/thumbnails/10.jpg)
Will it Float? The density of
liquid water is 1 g/mL.
Objects with a HIGHER density than water will ________.
Think of some examples…
![Page 11: A Look at Density and How to Calculate It. The RATIO of the mass of a substance to the space it takes up (volume) Substances have a characteristic.](https://reader030.fdocuments.us/reader030/viewer/2022032801/56649dd95503460f94acf061/html5/thumbnails/11.jpg)
It Floats If it has LOWER
density, it will ________.
Think of some examples…
![Page 12: A Look at Density and How to Calculate It. The RATIO of the mass of a substance to the space it takes up (volume) Substances have a characteristic.](https://reader030.fdocuments.us/reader030/viewer/2022032801/56649dd95503460f94acf061/html5/thumbnails/12.jpg)
Other factors that affect DENSITY:
The density of a GAS varies with pressure and temperature:• Higher temperature – molecules farther
apart – LESS dense• Lower temperature – molecules closer
together – higher pressure - MORE dense
![Page 13: A Look at Density and How to Calculate It. The RATIO of the mass of a substance to the space it takes up (volume) Substances have a characteristic.](https://reader030.fdocuments.us/reader030/viewer/2022032801/56649dd95503460f94acf061/html5/thumbnails/13.jpg)
![Page 14: A Look at Density and How to Calculate It. The RATIO of the mass of a substance to the space it takes up (volume) Substances have a characteristic.](https://reader030.fdocuments.us/reader030/viewer/2022032801/56649dd95503460f94acf061/html5/thumbnails/14.jpg)
Units for Density Just like length, volume and mass,
density has to be labeled with the correct unit…
g/cm³ or g/mL is the standard unit for density. 1cm³ = 1mL
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