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26 Cards in this Set
- Front
- Back
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The formula for density is ....
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D = M / V
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The unit for mass that we typically use in chemistry is....
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Grams (g)
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The unit for volume that we typically use in chemistry is....
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Milliliter (ml)
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The unit for density that we typically use in chemistry is...
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Grams per milliliter (g/ml)
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Another unit for volume that means the same a milliliter is ....
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Cubic centimeter (cm3) or centimeter cubed
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To calculate mass if given the density and volume, what do you do?
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M = V x D
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To calculate volume if given the mass and density, what do you do?
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V = M / D
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If the mass of a material is 100 grams and the volume is 50 mL, then what is the density?
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2 g/mL
D = 100 g / 50 mL |
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If the mass of a material is 75 grams and density is 10 g/mL, then what is the volume?
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7.5 mL
V = M / D = 75 g / 10 g/mL |
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If the volume of a material is 40 mL and the density is 10 g/mL, what is the mass of the material?
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400 g
M = V D = 40 mL x 10 g/mL |
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Why do you need the mass of the empty graduated cylinder when you are measuring the density of a liquid?
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You must subtract that mass from the mass of the filled cylinder to get the mass of the liquid.
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Why do you need a cylinder of water when you are measuring the mass of a solid?
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You measure the volume by seeing how much the water rises in the cylinder.
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If you mix these liquid materials together, how will they layer out?
A = 3.4 g/mL B = 2.1 g/mL C = 1.0 g/mL |
C-least dense
B A -densest |
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What happens to the size of any material that heats up?
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It expands (Volume gets bigger)
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Why does warm water tend to float on cold water?
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Warm water occupies more volume(because of expansion) per gram than colder water does (which hasn't expanded)
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What can you conclude about the density of ice compared to liquid water if the ice floats in water?
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Ice is less dense than liquid water.
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Unlike most other substances, what happens to the volume of water when it freezes?
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It expands, which explains why it floats in water
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What happens to the density of any substance when it expands?
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Density decreases because
D = M / V. When V gets bigger, the D gets smaller. |
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What volumne will give the largest density?
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Smallest volume will give largest density if masses are the same.
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Four objects with equal volumne, but different mass?
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Largest mass gives largest density if volumes are the same. D = M / V
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Freezing
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The transformation from liquid to solid.
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Melting
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The transformation from solid to liquid.
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Boiling
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The transformation from liquid to gas.
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Condensation
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The transformation from liquid to gas.
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Evaporation
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The transformation from liquid to gas.
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Sublimation
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The transformation from solid to gas.
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