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Intro Vocab Density Problems Physical vs Chemical
$100 $100 $100 $100 $100
$200 $200 $200 $200 $200
$300 $300 $300 $300 $300
$400 $400 $400 $400 $400
$500 $500 $500 $500 $500
Final Question
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• Find the percent error.
• The acutal value of the density of gold is 19.32 g/mL. A student found the density in lab to be 19 g/mL
Intro$100
• What piece of lab equipment is used to accurately measure volume?
• Graduated cylinder
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Vocab$100
• Contrast mass and weight
• Mass = measures mass
• Weight= measures mass + gravity
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Vocab$200
• Contrast qualitative and quantitative
• Qualitative = qualities (color, shape)
• Quantitative = quantities (50 g, 10 cm)
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Vocab$300
• Define reactants and products
• Reactants = substances start with
• Products = substances end with
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Vocab$400
• Matter can be classified into these two categories
• Substances and mixtures
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Vocab$500
• Define precision and accuracy
• Precision = how close measurements are to one another
• Accuracy = how close measurements are to the target
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Density$200
• How do we know if an object will float or sink?
• Float if density < 1 g/mL
• Sink if density > 1 g/mL
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Density$400
• What is the density of an object with a volume of 20 mL and a mass of 100 grams? (must include units in your answer)
• D = M / V = 100 / 20 = 5 g/mL
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Density$500
• If the following compounds were put in one container how would they separate the compounds from top to bottom
• Baby oil, vegetable oil, milk, honey
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Honey 1.42 g/mL
Vegetable oil
0.92 g/mL
Baby oil 0.83 g/mL
Milk 1.03 g/mL
Problems$300
• How would you write the following number in scientific notation? 0.000 32
• 3.2 x 10-4
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Problems$400
• Calculate the density of this irregular shaped object
• Volume object = 80-50 = 30• Density = M / V = 90 / 30 = 3 g/mL
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Volume of water 50 mL
Volume of water + object 80 mL
Mass of object 90 g
Problems$500
• Use a calculator to solve the problem but report your answer to the correct sig figs
24.010 + 30.00 + 16.822
• 70.83
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Physical vs Chemical$100
• Give an example of each– Physical PROPERTY– Chemical PROPERTY
• Physical = color, mass, weight, taste, smell• Chemical = reactivity, flammability
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Physical vs Chemical$200
• Give an example of each– Physical CHANGE– Chemical CHANGE
• Physical = tearing, crushing, phase change• Chemical = burning, digestion, rusting
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Physical vs Chemical$300
• Classify water boiling as a physical or chemical change and give reasoning
• Physical change—no new substance is formed; just a change in state of matter
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• Give 2 example of each– Intensive physical property– Extensive physical property
• Intensive = color, taste, smell, density, melting point, freezing point, boiling point
• Extensive = mass, volume, area, length, width, height
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Physical vs Chemical$400