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Ch.5 Chem EQ
Test Description: Chem EQ
Instructions: Answer all questions to get your test result.
1) What do we call the 'things' on the RIGHT side of the equation
A
Formula
B
Product
C
Reactants
D
Elements
2) What do we call the 'things' on the LEFT side of the equation?
A
Reactants
B
Elements
C
Formula
D
Product
3) TOR: Two elements, plus sign on the LEFT side.
A
decomp
B
double replacement
C
single replacement
D
synthesis
4) TOR: Two elements, plus sign on the RIGHT side.
A
synthesis
B
decomp
C
Double replacement
D
Single replacement
5) TOR: Three elements, A+BC---AB+C
A
Single replacement
B
synthesis
C
decomp
D
Double replacement
6) Four or more elements, two switch.
A
single replacement
B
decomp
C
synthesis
D
double replacement
7) If we see an (l) in a equation, what does it mean?
A
liquid
B
aqueous (ions)
C
gas
D
solid
8) Mg + O2---MgO. Balanced equation would be:
A
Mg + O2---2MgO
B
2Mg + O2---2MgO
C
2Mg + 2O2---2MgO.
D
Mg + O2---MgO2
9) Mg + O2---MgO what is diatomic in this equation?
A
MgO
B
Mg
C
O2
D
Nothing is
10) Endothermic applies to all of the following, except?
A
Energy leaves the system.
B
Will get 'colder'
C
More energy is seen AFTER the reaction
D
Energy enters the system
11) Exothermic applies to all the following, except?
A
Energy leaves the system
B
Will get 'hotter'
C
Most reactions will be exothermic
D
All of them are correct
12) In H2O +(NO3)2 (assume those numbers are little) how many oxygens do we have?
A
6
B
3
C
2
D
7
13) Atoms are not created nor destroyed during chemical reactions is known as?
A
Theory of mass
B
Law of mass
C
Law of conservation of mass
D
Chemistry
*select an answer for all questions
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