Density+Page

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Density is the property that describes the relationship between mass and volume.

This is a picture of a density column. The least dense liquid is at the top, and the most dense liquid is at the bottom. The picture is from [|http://www.scholarchemistry.com].


 * Density describes how tightly packed the atoms or molecules of a substance are. Solids are usually more dense than liquids.
 * Ice is an exception. Solid water (ice) is actually less dense than liquid water because when water molecules freeze, they form a pattern that has an unusual amount of empty space.
 * Density only depends on what the material is and not on the size or amount of the material. For example, if you cut a piece of wood in half, both pieces would have the same density.
 * The density of liquid water is 1 g/mL. If an object has a density less than 1, it will float in water. If an object has a density greater than 1, it will sink in water.
 * When ordering liquids in a density column, the most dense liquid will be at the bottom, and the least dense liquid will be at the top.

d = m/v

density = mass/volume

D = density (grams per milliliter, g/mL) m = mass (grams, g) v = volume (milliliters, mL)

1) The density of gasoline at 20° C is 0.7 g/mL. What is the mass of 4 liters of gasoline?

Answer

2) A wooden block has a length of 10 cm, a height of 5 cm, and a width of 2 cm. The mass of the wooden block is 500 g. What is the density?

Answer