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Ingamells Chemical Reactions SEPUP Review Flashcards | StudBud
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Ingamells Chemical Reactions SEPUP Review
Ingamells Chemical Reactions SEPUP Review
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#SEPUP #chemistry
Flashcards
30 cards
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Practice quiz
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Questions
30
Answers
1
What kind of change is salt
dissolving
into water?
Physical
Chemical
2
Which is a balanced equation?
2H2+O2 --> 2H2O
H2+O2 --> H2O
H2+O2 --> H2O+O
H2+O2 --> H2O2
3
What are all molecules made of?
precipitates
atoms
acids
chemicals
4
How many total atoms are there in H
2
CO
3
?
2
6
5
3
5
Which of the following might be evidence of a chemical reaction?
Unexpected color change
solubility
A phase change.
6
What are chemical reactions
amount of an element that is at the end was at the beginning
the amount of energy the organism uses
process that changes substances into other substances
allows the cells function properly, and maintain life
7
Which of the following equations demonstrates the law of conservation of mass?
2Fe + 3O2 → Fe2O3
2H2 + O2 → 2H2O2
C + O2 → 2 CO
2K + Cl2 → 2KCl
8
Which of the following is NOT evidence of a chemical reaction?
Gas is produced
A substance changing phase
precipitate is formed
Temperature Change
9
What is the correct chemical equation for producing water?
H2 + O2 > H2O
2H2+O2 > 2H2O
10
In a chemical reaction some of the atoms are destroyed.
True
False
11
What are signs of a chemical reaction?
color, temperature, gas
odor change
releasing heat
absorbing heat
12
The Law of Conservation of Mass states:
matter can be created and destroyed.
Matter is not real.
Matter cannot be created and it cannot be destroyed.
Matter can not be created but it can be destroyed.
13
does this model accurately show a chemical reaction?
no
pineapple
yes
14
Which is a physical change?
Baking a birthday cake
Burning a piece of paper
Baking soda and vinegar mixing together
A glass falling and shattering on the floor
15
What do we call it when two solutions are chemically combined and produce a solid?
Precipitate
Dilution.
Endothermic
16
What type of system releases materials and/or energy to the outside environment?
Open System
Chemical System
Closed System
17
Does this follow the Law of the Conservation of Mass?
No, we need at least 1 more blue and 3 white in the Reactants (ingredients)
This law does not apply to chemical reactions
No we need 1 more blue atom and 1 white atoms for the final products
Yes because mass of reactants = mass of products
18
does this model accurately show a chemical reaction?
how should I know?!
no
yes
19
How often do you make chemistry jokes?
Never.
Always.
Every other day.
Periodically.
20
What is used to arrange elements on the modern periodic table?
Atomic Number
State of matter
Atomic Mass
21
Which of the following are an example of a chemical change
A rock being broken down into small pebbles'
An egg being cooked.
Breaking a penicil in half.
Evaporating water.
22
In a chemical reaction
Products produce reactants.
Reactants produce products
23
How many carbon atoms are in the formula H
2
CO
3
?
6
2
1
3
24
What is the release of heat during a chemical reaction called?
Exothermic
Temperature
Endothermic
25
What is it called when energy is absorbed during a chemical reaction?
Conductivity
Endothermic
Exothermic
26
Endothermic reactions...
needs energy to be added constantly to continue
releases thermal energy
absorbs thermal energy
27
are fireworks chemical or physical change?
Chemical change.
Neither.
Physical change.
28
Which chemical formula identifies the model shown?
H2O
CO2
O2
NH3
29
Which of the following is a chemical change?
glass breaking
Acid reacting with another substance.
Salt dissolving in water.
ice melting
30
Where do we see chemical reactions in our everyday lives?
going down a slide
cutting paper
baking
