Chapter 1d - Quiz 1 Chapter 1 CHM 2040-0004 September 8 2015 Question 1 Which of the following is a valid hypothesis A Nitrogen is a fairly unreactive

Chapter 1d - Quiz 1 Chapter 1 CHM 2040-0004 September 8...

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Quiz 1 Chapter 1 CHM 2040-0004 September 8, 2015
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A. Nitrogen is a fairly unreactive gas B. Copper has a red-orange metallic luster C. When a substance combusts, it combines with oxygen in the air D. Sodium reacts violently with water E. Oxygen is a gas at room temperature Which of the following is a valid hypothesis? Question 1
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A. Has definite shape and volume B. Is compressible C. Has indefinite volume and indefinite shape D. Has particles that are packed close together and can move E. Retains its shape in a new container Which of the following describes a liquid ? Question 2
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Liquids Packed close together and can move (flow) • Incompressible Takes the shape of container Definite volume but indefinite shape Matter classified by physical form:
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A. dissolving a solid into a liquid B. separating a solid from a liquid by pouring off the liquid C. pouring a mixture through a filter paper to separate a solid from a liquid D. heating a mixture of two solids to fuse them together E. separating a homogeneous liquid mixture by boiling off the more volatile substance Distillation is Question 3
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Physical Separation Methods Distillation – separating homogeneous mixtures with different volatilities Examples: Oil refining Seawater desalination Alcohol production
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A.
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