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67 terms

Chemistry Chapter 2

STUDY
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mixture
A physical blend of two or more componets
product
A substance formed a chemical reaction
phase
Part of a sample having uniform compositions and properties
reactant
Starting substance in a chemical reaction
heterogeneous mixture
Not uniform in composition
vapor
Gaseous state of substance that is a liquid or solid at room temperature
distillation
A process in which a liquid is boiled to produce a vapor that is condensed again into a liquid
mass
Amount of matter an object contains
chemical reaction
Process in which substances are changed into different substances
compound
Composed of two or more substances chemically combined in a fixed proportion
element
Substance that cannot be changed into simpler substances by chemical means
homogeneous
Describes mixture with a uniform composition
In the chemical reaction in which sucrose is heated ans decomposes to form carbon dioxide and water, which of the following is a reactant?
Sucrose
What must occur for a change to be a chemical reaction?
There must be a change in chemical properties
Which of the following is NOT a physical property of water?
It is a compound of hydrogen and oxygen
Which of the following are considered physical properties of a substance?
Color and odor, malleability and hardness, melting and boiling points
A vapor is which state in matter?
Gas
All of the following are physical properties of matter except
Ability to rust
The chemical symbol for iron is
Fe
Which of the following represents a compound
H2O
A substance that forms a vapor is generally in what physical state at room temperature
liquid or solid
Which state of matter has a definite volume and takes the shape of its container?
liquid
Which state of matter is characterized by having a definite shape and a definite volume?
Solid
Which of the following Cannot be classified as a substance?
Air
Which of the following is a heterogeneous mixture
salt water
Which of the following cannot be considered a sing phase
a heterogeneous mixture
Which of the following is NOT an example of matter?
heat
A golf ball has more mass than a tennis ball because it
Contains more matter
An example of an extensive property of matter is
Mass
Which of the following is true about homogeneous mixtures?
They are known as solutions
Which of the following is a heterogeneous mixture?
Oil and vinegar
Which of the following is a homogeneous mixture
Salt water
Separating a solid from a liquid by evaporating the liquid is called
distillation
An example of a homogeneous mixture is
stainless steel
Which of the following items is Not a compound
salad dressing
Which of the following items is true about compounds
They are substances
A substance that can be separated into two or more substances only by a chemical change is a
compound
Which of the following materials is a substance
Silver
What is one difference between a mixture and a compound
A compound can only be separated into its components by chemical means
What distinguishes a substance from a mixture?
Mixtures can be separated physically, while compounds cannot.
Which state of matter takes both the shape and volume of its container?
gas
Which state of matter is characterized to have an indefinite shape, but a definite volume?
liquid
The first figure in a property written chemical symbol always is
Capitalized
Which of the following is used for chemical symbols today?
Letters
The chemical formula of a compound does Not indicate
how elements are joined in the compound
What do chemical symbols and formulas represent, respectively?
Elements and compounds
Which state of matter expands when heated and is easy to compress?
gas
All of the following are physical properties of a substance in the liquid state except
indefinite volume
Which of the following is a physical change?
Evaporation
Which substance has a chemical symbol that is derived from a Latin name?
Potassium
Which of the following is a chemical property?
ability to react with oxygen
Which of the following is Not a physical change?
Melting cheese
All of the following changes to a metal are physical changes
Bending, melting, and polishing
Which of the following is does Not involve a change in a chemical properties
boiling
What must be done to be certain that a chemical change has taken place
Check the composition of the sample before and after the change
When paper turns yellow-brown upon exposure to sunlight, what type of change is likely taking place
a chemical change
Which of the following does not indicate that a chemical change may have taken place?
Fracture formation
Which action changes the identity of a substance referenced?
corroding iron
What happens to matter during a chemical reaction
Matter is neither destroyed nor created
A chemical change occurs when a piece of wood
decays
Which of the following is a chemical property of water at 4 degreesC
Its ability to decompose into hydrogen and oxygen
Which of the following is true for all chemical reactions
The total mass of the reactants equals the toal mass of the products
When an iron nail is ground into powder, its mass
stays the same
IN how many physical states does water commonly exist
3
What is the boiling point of water in degrees Celsius
100
What is the melting point of water in degrees Celsius
0
How many grams of liquid water are produced when 60 grams of ice melt
60 grams