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Unit 2: Matter-Properties and Changes Flashcards | StudBud
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Unit 2: Matter-Properties and Changes
Unit 2: Matter-Properties and Changes
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#properties #phase changes #matter #compound #element
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Answers
1
A heterogeneous mixture is which of the following.
glass of root beer
glass of orange juice with pulp
glass of lemonade
glass of cherry coke
2
Nitrogen monoxide (NO) is 47 %nitrogen by mass. This situation described is following
None of the above
Law of Multiple proportions
Law of conservation of matter
Law of definite proportions
3
Which of the following is not a chemical property?
burns with oxygen
reacts with acid
Melts when heated
oxidizes
4
Mass
measured in grams
Measured in grams and the same as weight
measured in lbs
Is different when you are on the moon
5
Physical properties can be used to identify unknown materials.
False
Ture
6
When a gas is cooled and becomes a liquid, it is called...
Condensation
Melting
Sublimation
Freezing
7
Like in dry ice, when a solid becomes a gas, it is called...
Freezing
Melting
Sublimation
Condensation
8
Distillation is based on the differences in?
freezing point
melting point
solid mixtures
boiling point
9
The law of conservation of mass says?
Mass is dependent on the chemical reaction
Mass of the reactants = the mass of the products
The chemical reaction determines the mass quantity
The mass of the reactants and products are in different form
10
Boiling Water
Chemical Change
Physical Change
11
The one or two letter representation of an element.
Chemical Letter
Chemical Chemical
Chemical Name
Chemical Symbol
12
Which molecule below is an element?
NH3
H2SO4
CH4
N2
13
The formula for percent by mass is as follows. (Equations are multiplied by 100.)
% Mass = Mass of element x Mass of Compound
% Mass of element = Mass of Element/ mass of compound
% mass of element = Mass of Compound / mass of element
% mass of element = Mass of element/ mass of another element
14
A form of matter that flows, has a fixed volume, and takes the shape of the container its in
Gas
Solid
Oprah
Liquid
15
What classification is given a glass of salt water?
Homogeneous
Clear
salty
Hetereogeneous
16
Classify the following
pure substance
homogeneous mixture
heterogeneous mixture
17
Melting Butter
Chemical Change
physical change
18
When water vapor (gas) goes straight from a gas to a solid, we call it...
Vaporization
Deposition
Freezing
Condensation
19
Elements have symbols so scientists all over the world can communicate without confusion.
True
False
20
The properties of a mixture can vary because the composition is fixed (the same throughout).
True
False
21
Frying egg
Chemical Change
Physical Change
22
The image of sand shows a(n) ___________ mixture.
homogeneous
heterogeneous
23
At the critical point of water
all three phases can exist in equilibrium
liquid and gas phases can exist at equilibrium
all three phases become indistinguishable from each other
liquid and gas phases become indistinguishable
24
Rotting banana
Physical Change
Chemical Change
25
A substance that cannot be separated into simpler substances
Liquid
Pure Substance
Compound
Element
26
When a solid is turned into a liquid, the phase change is called....
vaporization
freezing
melting
sublimation
27
When a substance physically changes from one state to another.
nuclear change
Chemical Change
phase change
28
Two chemicals are mixed. The mixture begins to get hot.
Chemical Reaction
Physical Change
29
Which Statement is true?
Oxygen atoms are a compound.
Oxygen and Hydrogen are elements
Water is classified as an element.
A water molecule is an element.
30
A mixture whose components are not uniform in nature; Components are easily distinguished
Heterogeneous Mixture
Potato
Physical Property
Homogeneous Mixture
31
chocolate pudding is an example of a _________mixture.
heterogeneous
homogeneous
32
Chemical changes will often cause a ____________.
change in color
all of the above
formation of a solid percipitate
production of gas
33
Sodium Chloride mass = 59g. Mass Na = 24g. What is the % mass of Chloride.
69 % chloride by mass
41 % Chloride by mass
42 % chloride by mass
59 % chloride by mass
34
When water boils or evaporates, and goes from a liquid to a gas, we call it...
Freezing
Sublimation
Vaporization
Condensation
35
An element is a substance that?
is the simplest form of matter
is only naturally occurring
exists in 128 different forms
Can be broken down by chemical means
36
matter that has no definite shape or volume. Takes the shape of the container that it is in.
Solid
Newtonian Fluid
Liquid
Gas
37
Which is a method of separating a mixture?
Filtration
All of the above
Magnetism
Distillation
38
Which statement is FALSE?
Compounds are made from only one element.
Compounds can be broken into separate elements.
Elements are found on the Periodic Table
Compounds are made from more than one element.
39
Which below is a compound?
N2
Fe2
H12
CO2
40
Boiling point is a _______ Property
extensive
intensive
mendlevean
chemical
41
When a liquid is turned into a solid, it is called...
freezing
vaporization
Sublimation
melting
42
When hydrogen and oxygen combine in a ratio of 2 to 1, this molecule is called a
mixture
solution
compound
element
43
Glucose is C
6
H
12
O
6
, which is true about glucose?
Properties are just like hydrogen
properties are just like oxygen
glucose has properties that are different than the elements
properties are just like carbon
44
1 grams of lithium react with excess fluorine to form 25g of LiF. How much F reacts?
25 g
11 g
14 g
5 g
45
What elements make up this compound?
carbon, hydrogen, osmium
carbon, helium, oxygen
carbon, hydrogen, oxygen
cesium, hydrogen, oxygen
46
Both NO and NO
2
arecompounds of nitrogen and oxygen. This situation described is following
None of the above
Law of conservation of mass
Law of definite proportions
Law of Multiple proportions
47
Kool-aid is an example of a _______mixture.
homogeneous
heterogeneous
48
Matter that always has exactly the same composition is a(n) ____________.
mixture
colloid
pure substance
compound
49
An antacid (tums) is drop in a glass of acidic solution. Gas bubbles form
Chemical change
physical property
50
Compounds, by definition, have ...
more than one atom.
more than one type of element.
only one type of atom.
aren't even real.
51
Reactivity is a ____________ property.
Chemical
Physical
52
Anything that takes up space and has mass.
Chemical Reaction
Pure substance
rettaM
Matter
53
Salsa is an example of a_________mixture
Heterogeneous
Homogeneous
54
25% Potassium and 75% Bromine. Compound masses 36g. What is the mass of Br in the compound?
27 g
25 g
9 g
18 g
55
Look at sulfuric acid. H
2
SO
4
How many hydrogen atoms are present?
7
2
4
1
56
When 7 grams of N combines with 8 grams of O, 15 grams of NO is produced. This according to
Law of multiple proportions
Law of definite proportions
none of the above
Law of conservation of mass
57
Which of the following phase changes is incorrect?
solid -> gas, sublimation
liquid -> gas, evaporating
solid -> liquid, melting
gas -> solid, condensation
58
Crumpled Paper
Chemical Change
Physical Change
59
Properties that do not depend on the amount of matter present.
Physical
Extensive
Chemical
Intensive
60
Which of the following is NOT a type of mixture?
colloid
compound
suspension
solution
61
A physical blend of two or more substances that are not chemically combined.
French Fry
Mixture
I love Chemistry
Liquid
62
matter cannot be created nor destroyed
Law of metric conversions
The right Answer
Law of conservation of mass
Law of conservationism
63
If 10 grams of reactants are used, how many grams of products should be theoretically produced?
10-15
15
5-10
10
64
A container of Sodium Iodide masses at 50 g. If there are 20 g of Na what is the % mass of I
2
?
40%
60%
43%
23%
