Download - Wake-up
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Wake-upShow all work using the following information to convert. 1 quark=2.9 who 1 who=5 mabees
1 bug = 3.7 quark 1 kuz = 3.2 mabees
a. 4.5 bug to quark
b. 3.3 mabees to quark
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Density
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Which container is more dense?
Container A has more particles therefore is more dense; takes up more volume than B
A B
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What is Density?
The relationship between the
mass of a substance and
how much space it takes up (volume).
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Density Formula
Density = Mass = grams = grams Volume cm3 mL
Units
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Density Triangle
Density =
Mass =
Volume =
MassVolume
Density x Volume
MassDensity
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Example #1
Some liquid nitrogen has a mass = 14 grams and a volume = 36.3 mL. What is the density?
Density = Mass = 14 grams = 0.386 g/mL Volume 36.3 mL
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Example #2A sample of wood has a mass of 58g and a volume
of 73cm3. What is the wood’s density?58g 73cm3 = 0.79g/cm3
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Example #3The density of gold is 19.3g/cm3. What would the
volume be fore a 180g sample of gold?180g
19.3g/cm3 = 9.32 cm3V = M D
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Example #4The density of steel is 7.8g/mL. What would the
mass be for a 14mL sample of steel?
(7.8g/mL)(14mL) = 109.2gM = D x V
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Example #5A substance has a mass of 24.32kg and a volume of 19.8L. What is the density?
D = Mass = 24,320 g = 1.23 g/mL Volume 19,800 mL
24.32 kg = 24,320 grams 19.8 L = 19, 800 mL
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Lab Practice ProblemAn unknown metal having a mass of 400 g was
added to a graduated cylinder that contained 40 ml of water. After the addition, the water rose to 78.1 ml. Using this info and a reference table, identify
the unknown metal.• Mass = ______ g• Volume = 78.1 ml – 40 ml = _____ ml• D = Mass
Volume • Identity of metal = ____________
400
38.1
400 g___
38. 1 mL
Silver
= 10.5g/mL
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Density via Displacement
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