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Unit 4 Extra Credit Quizizz

Total questions: 46

Worksheet time: 1hrs 10mins

Name
Class
Date
1.
2 Na + Cl₂ →       2 NaCl
a)
Double Replacement
b)
Synthesis
c)
Single Replacement
d)
Decomposition
2.

Cl2 + 2 SnI4 → I2 + SnCl4

a)

Single Replacement

b)

Decomposition

c)

Double Replacement

d)

Synthesis

e)

Combustion

3.

2 H₂O₂ → 2 H₂O + O₂

a)

Double Replacement

b)

Single Replacement

c)

Synthesis

d)

Decomposition

e)

Neutralization

4.

HCl + AgNO3 → AgCl + HNO3

a)

Single Replacement

b)

Decomposition

c)

Double Replacement

d)

Synthesis

e)

Neutralization

5.

C7H14 + O₂ → CO₂ + H₂O

a)

Decomposition

b)

Single Replacement

c)

Double Replacement

d)

Combustion

e)

Neutralization

6.
NaOH + HCl  → H2O + NaCl
a)
Neutralization
b)
Decomposition
c)
Synthesis
d)
Combustion
7.
NaCl + AgNO3 → AgCl + NaNO3
a)
Single Replacement
b)
Neutralization
c)
Double Replacement
d)
Combustion
8.
2Na +S → Na2S
a)
Double Replacement
b)
Decomposition
c)
Combustion
d)
Synthesis
9.
Zn + H2SO4 →  ZnSO4 + H2
a)
Neutralization
b)
Single Replacement
c)
Combustion
d)
Double Replacement
10.
2Pb(NO3)2 →  2PbO + 4NO2 + O2
a)
Decomposition
b)
Double Replacement
c)
Neutralization
d)
Synthesis
11.
C4H10 + O2 →  CO2 + H2O
a)
Decomposition
b)
Combustion
c)
Single Replacement
d)
Double Replacement
12.
2H2 + O2 →  2H2O 
a)
Single Replacement
b)
Decomposition
c)
Combustion
d)
Synthesis
13.
BaCl2 + Na2SO4 →  BaSO4 + 2NaCl
a)
Double Replacement
b)
Neutralization
c)
Decomposition
d)
Single Replacement
14.
 2 Fe  +  O2  --->  2 FeO 
a)
Synthesis
b)
Combustion
c)
Decomposition
d)
Neutralization
15.
BaCl2 + 2AgNO3 -->  2 AgCl +Ba(NO3)2 
a)
Decomposition
b)
Neutralization
c)
Double Replacement
d)
Single Replacement
16.
CaCO3  ------->  CaO  +  CO2 
a)
Synthesis
b)
Decomposition
c)
Combustion
d)
Neutralization
17.
2 KClO3 ------>  2 KCl  +  3 O2 
a)
Single Replacement
b)
Combustion
c)
Synthesis
d)
Decomposition
18.

Anthony is performing an experiment. He adds 0.25 grams of baking soda to 5 grams of water and stirs. Anthony watches as the baking soda dissolves in the water. If Anthony weighs the water and baking soda solution, what will its mass be?

a)

4.75 grams

b)

5.25 grams

c)

5.0 grams

d)

7.5 grams

19.

Matter can not be created nor destroyed: it can only be

a)

Destroyed a little bit

b)

Invisible

c)

Transformed, changed

d)

None of the above

20.

If reaction starts with 20g of reactants it should produce 

a)

a total of 40g of products

b)

a total of 80 g of products

c)

a total of 10g of products

d)

a total of 20g of products

21.

Which of the models of a chemical reaction best represents the Law of Conservation of Mass?

a)

A

b)

B

c)

C

d)

D

22.

Q. 

True or False

The mass of the reactants in a chemical equation must equal the mass of the products.

a)

TRUE

b)

FALSE

23.

A student heated a 10 gram sample of a chemical in an open container. A chemical reaction occurred, and the mass of the sample was measured again. The mass of the sample was found to be less than before the reaction. Which of the following best explains the decrease in mass of the sample?

a)

The heat caused the chemical to become less dense.

b)

Some of the lighter particles were destroyed.

c)

The reaction gave off more heat than was added.

d)

Some of the particles escaped as a gas formed.

24.

What does the number 3 represent in 4NH3?

a)

Subscript

b)

Superscript

c)

Coefficient

25.

What does the number 4 represent in 4NH3?

a)

Subscript

b)

Superscript

c)

Coefficient

26.

How many Nitrogen (N) atoms are in 4NH3?

a)

4

b)

1

c)

3

d)

12

27.

How many Hydrogen (H) atoms are in 4NH3?

a)

4

b)

1

c)

3

d)

12

28.

In the equation shown, what are the reactant(s)?

a)

N2 + H2

b)

NH3

29.

In the equation shown, what are the product(s)?

a)

N2 + H2

b)

NH3

30.

Choose the answer that balances this equation.

H2 + O2 --> H2O

a)

2H2 + O2 --> 2H2O

b)

2H2 + 2O2 --> H2O

c)

H2 + 2 O2 --> 2H2O

d)

balanced already

31.

H3PO4 + KOH ------> K3PO4 + H2O


Is this equation balanced?

a)

yes

b)

no

c)

impossible to determine

32.

Which choice shows this equation balanced?


K + B2O3 -----> K2O + B

a)

2K + B2O3 -----> K2O + 3B

b)

K + 2B2O3 -----> 4K2O + B

c)

6K + B2O3 -----> 3K2O + 2B

d)

balanced as is.

33.
Fill in the blanks with coefficient:
PCl5+_ H2O→_ HCl+H3PO4
a)
4, 5
b)
1, 6
c)
3, 8
d)
2,2
34.
Balance this equation
_Zn+_HCl-->_ZnCl2 +_H2
a)
1,1,2,1
b)
1,1,1,2
c)
1,2,1,1
d)
2,1,1,1
35.
Balance this equation.
_Mg + _Cl2 --> _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
36.
Balance this equation
_N2 + _H2 --> _NH3
a)
1,2,3
b)
1,3,2
c)
1,1,2
d)
2,1,1
37.
N2 + H2 = NH4
a)
Balanced
b)
Unbalanced
38.
Which number should go in the blank?
_ H2 + O2 -> 2 H2O
a)
1
b)
2
c)
3
d)
0
39.
Is the following equation balanced?
4Fe + 3O2 --> 2Fe2O3
a)
yes
b)
no
40.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__AgNO3 + __H2S --> __Ag2S+ __HNO3
a)
2,1 --> 1,2
b)
1,2 --> 1,1
c)
1,2 --> 1,2
d)
1,2 --> 2,1
41.
What is the Law of Conservation of mass?
a)
Mass is created in a chemical reaction
b)
Mass is created in a physical change
c)
New chemicals formed from a chemical reaction have a larger overall mass than the original reactants
d)
Mass is never created or destroyed
42.
In a reaction A + B ----> C,  reactant A has 5g and product  C has 9g. How many grams does reactant B should have? 
a)
4g
b)
5g
c)
9g
d)
14g
43.
The number in front of a compound or element is a 
a)
Subscript
b)
Coefficient
c)
Superscript
d)
Charge
44.
Matter can not be created nor destroyed: it can only be
a)
Destroyed a little bit
b)
Invisible
c)
Transformed, changed
d)
None of the above
45.
If a reaction starts with a total 75g of reactants it should produce 
a)
a total of 40g of products
b)
a total of 75g of products
c)
a total of 180 g of products
d)
None of the above
46.
Bob puts 200 grams of ice into a pitcher with 900 grams of water. He gets distracted and comes back later to find that the ice has melted in the water. How many grams of water does Bob now have in the pitcher?
a)
200 g
b)
700 g
c)
1,100 g

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