Font size
WorksheetsChemistry Unit 3
Total questions: 70
Worksheet time: 1hrs 15mins
What is a physical property? (chose all that apply)
characteristics of matter that can be changed without changing it's composition.
characteristics that are directly observably
characteristics that determine how the compositions of matter changes as a result of contact with other matter or the influence of energy.
changes in matter do not result in a change of the components that make up the substance.
What are chemical properties?
the characteristics that determine how the compositions of matter changes as a result of contact with other matter or the influence of energy.
characteristics that are directly observable
characteristics of matter that can be changed without changing it's composition
involves a change in the fundamental components of a new substance
What are physical changes?
involves a change in the fundamental components of a the substance
characteristics that are directly observable
changes in matter that do not result in a change of the components that make up the substance.
produces a new substance
What are chemical changes? (check all that applies)
changes in matter that do no result in a change of the components that make up the substance.
involves a change in the fundamental components of the substance.
produces a new substance
characteristics that determine how the compositions of matter changes
Examples of physical properties
color, smell, boiling/freezing/melting point, solubility
reactivity to air
reactivity to water
reactivity with heat
Which is not a chemical property?
reactivity with heat
density
reactivity with water
reactivity with air
Which way does the equation go?
Reactants --> Products
Products --> Reactants
What are intensive properties?
properties depend on the quantity of the sample and include measurements of mass and volume.
properties that relate to the amount of substance present.
properties that do not depend on the amount of substance
characteristics that are directly observable.
What are extensive properties? (check all that applies)
properties that relate to the amount of substance present
properties depend on the quantity of the sample and include measurements of mass and volume
properties that are directly observable
properties that do not depend on the amount of the substance
Length and Volume
Intensive
Extensive
Color and Density
Extenisve
Intensive
Mass and Area
Intensive
Extensive
Temperature (boiling/melting point)
Intensive
Extensive
Solid
No space between atoms, definite shape, definite volume, cannot be compressed, cannot flow
No space between atoms, definite shape, definite volume, cannot be compressed, can flow
No space between atoms, definite shape, definite volume, can be compressed, can flow
Little space between atoms, definite shape, definite volume, can be compressed, cannot flow
Liquid
Little space between atoms, indefinite shape, definite volume, cannot be compressed, cannot flow
Little space between atoms, indefinite shape, definite volume, cannot be compressed, can flow
Little space between atoms, indefinite shape, definite volume, can be compressed, cannot flow
Lots of space between atoms, indefinite shape, definite volume, cannot be compressed, cannot flow
Gas
Very spread out atoms, indefinite shape, indefinite volume, cannot be compressed, cannot flow
No space between atoms, indefinite shape, indefinite volume, can be compressed, can flow
Very spread out atoms, indefinite shape, indefinite volume, cannot be compressed, can flow
Very spread out atoms, indefinite shape, indefinite volume, can be compressed, can flow
What is matter?
Anything that occupies space and has mass
the basic building blocks of matter
how much something weighs
how many particles are in a given object
What are atoms?
Anything that occupies space and has mass.
the basic building blocks of matter
pure substances of one type of atom
substances that cannot be broken down
What is the smallest particle of an element?
atom
proton
neutron
electron
What are elements
Are pure substances of one type of atom, cannot be broken down further, and are found on the periodic table
substances made from the atoms of two or more elements
chemical combination of elements
can be broken down by chemical change
Select all that apply for compounds
Formed from simpler substances by chemical change
Elements forming compounds are combined in definite proportions by mass
substances which cannot be broken down into simpler substances by chemical reactions
Can be broken down into elements by chemical change
What is the Law of Definite Proportions?
Proportion is the same in all samples of the compound.
Proportion is almost the same in all samples of the compound.
Proportion is the same in 2 samples of the compound.
Proportion is never the same in all samples of the compound.
Select all that apply for mixtures
Variable composition
can be homogeneous or heterogeneous
can be separated into components based on physical properties
consists of two or more pure substances (compounds or elements)
Which of these are not ways to separate mixtures?
distilation
filtration
evaporation
augmentation
To use the physical property boiling point, which technique would you use?
filtration
distillation
evaporation
chromatography
To use the physical property state of matter, which technique would you use?
evaporation
distillation
filtration
chromatography
To use the physical property adherence to a surface, which technique would you use?
evaporation
chromatography
distillation
filtration
To use the physical property volatility, which technique would you use?
filtration
chromatography
distillation
evaporation
Is a mixture a pure substance
NO
YES
only sometimes
What does homogeneous mean?
non-uniform, contains regions with different properties than other regions
uniform throughout, appears to be 1 thing
What does heterogeneous mean?
non-uniform, contains regions with different properties than other regions
uniform throughout, appears to be one thing
What are solutions?
heterogeneous mixtures
homogeneous mixtures
pure substances
compounds
What is gasoline?
heterogeneous mixture
compound
homogeneous mixture
element
Is copper a pure substance or an element?
Neither
Element
Both
Pure substance
These are the 4 signs in recognizing chemical reactions, select them all and study them independently to get a better understanding.
change in color
formation of a precipitate (solid and not transparent)
production of a gas
transfer of energy (absorbed or emitted)
What are reactants?
the items that are present at the start of the reaction
the items produced in a reaction
What are products?
the items produced in a reaction
the items present at the start of the reaction
What does LOCOM stand for?
Law Of Conservation Of Mass
Logistics Of Conservation Of Mass
Law Of Conservation Of Materials
Law Of Connectivity Of Mass
What does LOCOM state?
Proportions are the same in all samples of a compound
during any chemical reaction, the mass of the products is always equal to the mass of the reactants
during any chemical reaction, the mass of the products is never equal to the mass of the reactants
during any chemical reaction, the mass of the products is always equal to half of the mass of the reactants
Chemical reaction is another name for....
products
reactants
chemical change
nothing, it can't mean any other thing
Solve this problem
43.1 grams
43.2 g
44 grams
43 grams
Sole this problem
5 kg
4 kg
4.5 kg
4.75 kg
Are iron and salt (Fe and NaCl) elements or compounds?
neither they are both mixtures
both of them are elements
salt is an elements and iron is a compound
iron is an element and salt is a compound
Is solubility a chemical or physical property?
physical
chemical
neither
Is the combination of salt and sand a mixture or compound?
neither
it actually forms an element
mixture
compound
what is the equation for percent yield?
percent yield = (theoretical yield/actual yield) x 100
percent yield = (actual yield/actual yield) x 100
percent yield = (theoretical yield/actual yield) x 10
percent yield = (actual yield/theoretical yield) x 100
Give an example of change in color that is a physical change
give an example of apparent loss of mass, but is still a physical change
give an example of apparent disappearance of a substance, but is still a physical property.
What is filtration?
The process of removing substances or components from a liquid mixture by using condensation and or boiling point.
The creation of a solid from a solution. Is a solid and not transparent.
non uniform, contains regions with different properties than other regions
The process of separating a solid matter from a liquid. A filter is used to let the liquid move into a new container or beaker while the solid stays in the filter.
What is a precipitate?
an object
the creation of a solid from a solution
the creation of a solution from a solid
the creation of gas from both a solid and solution
Does ductile mean; The ability for a material to be drawn or plastically deformed without fracture?
Yes
No
Is this the definition for malleability? [ The ability of a substance, usually a metal, to be deformed or molded into a different shape.]
No
Yes
Why are all given samples in substance having the same properties?
The same section gets tested over and over again causing the results to always come out the same way
The physical composition is the same while the chemical composition is different
They are made up of different materials
They have the same intensive properties because they all have the same chemical composition. It does not depend on the amount of substance.
What are the 3 classes of matter?
pure substance, compound, precipitate
compound, mixture, aluminium
element, compound, solution
compound, mixture, element
How are compounds different from an element ?
Elements are pure substances made up of two or more already existing elements. While, compounds are a pure substance made up of only one type of atom.
Elements and compounds aren't any different from each other. They have the same definitions and properties.
An element is a pure substance that is made up of one type of atom while a compound is a pure substance made up of atoms of two or more elements. An element cannot be broken down into a simpler substance, while compounds through chemical change can be broken down into simpler substances.
Because they are two different words, so they have to be different.
Does a chemical change affect the composition of matter?
yes, the composition actually changes causing a new substance to be formed
yes, because chemical changes change things always
no, a new substance isn't formed
no, a new substance is formed but it doesn't apply to the composition of matter
Which of these are not a physical change?
dissolving sugar in water
slicing a piece of bread
burning gas in an engine
evaporating sea water to obtain salt
Which of the following is a chemical change?
gasoline boils
oxygen is added to gas
gasoline burns
gasoline is poured into a tank
Which of the following is not an element?
copper
iron
magnesium
sucrose
Is vinegar, ethanol, end neon pure substances?
yes, they all are
only ethanol and neon are
only vinegar is
none of them are pure substances
which is a homogeneous mixture?
grape juice
aluminium
soil
milk
A sample of nitrogen dioxide (NO2) whose mass is 200.0 g contains 60.8 g of nitrogen. What mass of oxygen is in a 25.5 g sample?
17.57 grams
17.6 grams
17 grams
17.75 grams
A sample of sodium chloride whose mass is 100 g contains 39.3 g of sodium by mass. How many grams of chlorine are there in a 82.0 g sample?
50 grams
49.6 grams
49.78 grams
49 grams
A 100 g sample of table salt (sodium chloride) is made up of 39.3 g of sodium and 60.7 g of chlorine. How many grams of sodium would there be in a 168 g sample?
66.5 grams
66 grams
65.9 grams
66.05 grams
Does a new substance form in a physical change?
NO
YES
SOMETIMES
what is the smallest part of a compound?
atom
particle
molecule
element
Which two are considered pure substances?
elements and mixtures
compounds and mixtures
compounds and atoms
elements and compounds
Is the smallest part of a compound and atom?
NO
YES
What types of properties allow a mixture to be separated?
physical such as boiling point or distillation
physical such as color and ripping
chemical such as reactivity with air
chemical such as reactivity with water
