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Balancing Equations Quiz - 4th period
4 days ago by
weigand_90816
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• Question 1
300 seconds
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Q. Balance this equation...
HgO --> 2Hg + O2
It is balanced
2HgO --> Hg + O2
2HgO --> 2Hg + O2
• Question 2
300 seconds
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Q.

Balance this equation...

Sb2S3 + O2 --> Sb + SO2

It is balanced

Sb2S3 + 3O2 --> 2Sb + 3SO2

Sb2S3 + O2 --> 2Sb + SO2

What is Sb?

• Question 3
300 seconds
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Q. Which of the following shows the correct way to balance the chemical equation?
Fe + O2 -> Fe2O3
4Fe + 3O2 -> 2Fe2O3
2 Fe + 3O2 -> Fe2O6
4 Fe + O6 -> 2Fe2O3
None of the options are correctly balanced.
• Question 4
300 seconds
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Q.

Which of the following correctly balances this equation:

Sodium phosphate and potassium hydroxide will produce sodium hydroxide and potassium phosphate.

1 Na3PO4+3 KOH

--->

3 NaOH + 1 K3PO4

2 Na3PO4+2 KOH

--->

3 NaOH + 1 K3PO4

1 S3PO4+3 SOH

--->

3 SOH + 1 K3PO4

3 Na3P+3 KO2H

--->

3 NaH2O + 1 K3P

• Question 5
300 seconds
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Q.

What coefficient belongs with HCl?

Mg + ___ HCl → MgCl2 + H2

1

2

3

4

• Question 6
300 seconds
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Q. Balance this equation:
2Li + Cl2 -> LiCl
2Li + Cl2 -> 4LiCl2
2Li + Cl2 -> LiCl2
2Li + Cl2 -> 2LiCl
• Question 7
300 seconds
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Q.

Which coefficients will correctly balance this equation:

_Al +_HCl --> _H2 +_AlCl3

2, 6, 3, 2

it is already balanced

4, 12, 3, 4

2, 1, 4, 5

• Question 8
300 seconds
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Q.

Choose the coefficients that will correctly balance this equation.

_CH4 + _O2 --> _CO2 + _H2O

1,2,1,1

2,1,2,1

1,2,1,2

0,2,0,2

• Question 9
300 seconds
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Q. What is the left part of a chemical equation called...
H2 + O --> H2O
Reactants
Products
Yields
Chemical Equation
• Question 10
300 seconds
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Q. KClO3 --> KCl + O2
What coefficient would go in front of KCl?
1
2
3
4
• Question 11
300 seconds
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Q. BaF2 + K3PO4 --> Ba3(PO4)2 + KF
What coefficient goes in front of K3PO4?
1
2
3
4
• Question 12
300 seconds
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Q.

Which type of chemical reaction forms Carbon Dioxide and Water?

Double Replacement

Single Replacement

Combustion

Decomposition

• Question 13
300 seconds
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Q. Name this reaction:  2Ca + O2 --> 2CaO
Decomposition
Synthesis
Double Replacement
Combustion
• Question 14
300 seconds
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Q. Balance this equation:
___NH3 + ___O2 --> ___NO + ___H2
4NH3 + 5O2 --> 4NO + H2O
4NH3 + 5O2 --> 4NO + 6H2
• Question 15
300 seconds
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Q. ____ P4 + ____ O2 --->____ P2O3
1,3,2
1,1,1
1,2,3
2,1,2
• Question 16
300 seconds
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Q. Which type of reaction is:
2 NaBr + Ca(OH)2 → CaBr2 + 2 NaOH
Synthesis
Single Displacement
Double Displacement
Combustion
• Question 17
300 seconds
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Q. Fill in the blanks with coefficient:
PCl5+_ H2O→_ HCl+H3PO4
4, 5
1, 6
3, 8
2,2
• Question 18
300 seconds
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Q. The red numbers in the image below represent ________
subscripts
coefficients
I don't know, and don't want to try
None of the answers are correct
• Question 19
300 seconds
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Q. How many O's are in Al₂(SO₄)₃
4
12
7
24
• Question 20
300 seconds
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Q.

What is the right part of a chemical equation called...

H2 + O2 --> H2O

Reactants

Products

Yields

Chemical Equation

• Question 21
300 seconds
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Q.

What is the arrow in a chemical equation...

H2 + O2 --> H2O

Reactants

Products

Yields

Chemical Equation

• Question 22
300 seconds
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Q. What is the little number after an element in a chemical equation called.
Example: H2
Coefficient
Subscript
Atom
Equation
• Question 23
300 seconds
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Q.

What do the elements oxygen, hydrogen, and chlorine have in common?

all are metals

all exist as diatomic moolecules

all have positive charge numbers

all give electrons to satisfy the octet rule

• Question 24
300 seconds
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Q.

What is meant by a "diatomic molecule?

It is an atom that always has a coefficient of 2 in a balanced equation

it is an element that always has a plus 2 charge

it is a compound that has two elements only

it is when two atoms of the same element pair up to satisfy the octet rule

• Question 25
300 seconds
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Q.

In a decomposition reaction...

a more complex substance, like a compound, is broken into smaller parts

two or more polyatomic ions are combined to compose a more complex molecule

ionic bonds are broken and reformed as covalent bonds

two single atoms are combined to make a compound

• Question 26
300 seconds
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Q.

The law of conservation of mass states...

the coefficients in a balanced equation must be the same on both sides of the arrow

that matter cannot be created nor destroyed

the charge must be conserved from the reactants to the products

subscripts in chemical formulas must all be equal

• Question 27
300 seconds
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Q. How many HCl molecules do you need to balance this equation?
Mg +  __HCl --->  MgCl2 + H2
1
2
3
4
• Question 28
300 seconds
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Q.

How many oxygens are in the following?

3Pb(OH)4

1

3

4

12

• Question 29
300 seconds
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Q.

What are the numbers that you CANNOT change in a chemical equation?

Coefficients

Products

Reactants

Subscripts

• Question 30
300 seconds
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Q. Balance this equation
_Zn+_HCl-->_ZnCl+_H2
1,1,2,1
1,1,1,2
1,2,1,1
2,1,1,1
• Question 31
300 seconds
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Q. Which problem is balanced?
PbO2 + 2H2
SO2 + H20 --> H2SO4
2Na + 2H2O --> 2NaOH + H2
• Question 32
300 seconds
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Q.

What type of chemical reaction is this?

2Fe + 3O2 --> 2Fe2O3

synthesis

decomposition

single replacement

double replacement

• Question 33
300 seconds
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Q.

What is meant by a chemical change?

it is when atoms are chemically altered by losing/gaining electrons

the ability of a substance to combine with or change into a different substance

a process in chemical equations where protons are changed into neutrons

• Question 34
300 seconds
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Q.

Which of the following is NOT an indication that a chemical change has taken place?

light is produced

there is a change in color

a change from a solid to a liquid

• Question 35
300 seconds
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Q.

In order for a chemical reaction to occur atoms or molecules must collide with enough energy so that...

bonds are broken

light is absorbed

energy is formed

protons change into neutrons

• Question 36
300 seconds
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Q.

The arrow in a balanced equations means...

yields

heat

energy

• Question 37
300 seconds
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Q.

What is the expression for this balanced equation in words? Al2(SO4)3 + BaCl2 ----> AlCl3 + BaSO4

aluminum sulfide an barium chlorine yield aluminum chlorate and barium sulfate

aluminum sulfate and barium chloride yields aluminum chloride and barium sulfate

aluminum sulfide and barium chlorate yields aluminum III chloride and barium II sulfide

aluminum sulfite and barium chloride yields aluminum chlorate and barium sulfite

• Question 38
300 seconds
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Q.

AB ----> A + B is the general form of a __ reaction

decomposition

synthesis

double replacement

single replacement

• Question 39
300 seconds
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Q.

AX + BY -------> AY + BX is the general form for a ___ reaction.

decomposition

synthesis

single replacement

double replacement

• Question 40
300 seconds
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Q. Balance the equation:
Si(OH)4+NaBr-->
SiBr4+NaOH
Si(OH)4+2NaBr--> SiBr4+NaOH
Si(OH)4+4NaBr--> SiBr4+4NaOH
Si(OH)4+NaBr--> SiBr4+4NaOH
Si(OH)4+2NaBr--> SiBr4+2NaOH
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