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Formulas & Balancing Equations

Total questions: 100

Worksheet time: 3hrs 39mins

Name
Class
Date
1.

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

2.

What is the formula for the Oxide ion?

a)

O7 2-

b)

O2 2-

c)

O 2-

d)

O3 2-

3.

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


Is this equation balanced?

a)

yes

b)

no

c)

impossible to determine

4.

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.

5.

HCL + NaOH ---> NaCl + H2O


Is this equation balanced?

a)

yes

b)

no

c)

Cannot determine

6.

Choose the answer that shows this equation balanced:


C + S8 ----->CS2

a)

4C + S8 ----->4CS2

b)

3C + S8 -----> 2CS2

c)

C + 2S8 -----> 6CS2

d)

8C + S8 -----> 4CS2

7.

What is NO3- ?

(a)  

8.

Choose the Answer that shows this equation balanced:


Na + O2 ----> Na2O2

a)

Na + 3O2 ----> Na2O2

b)

2Na + O2 ----> Na2O2

c)

Na + 2O2 ----> Na2O2

d)

3Na + 2O2 ----> Na2O2

9.

What is the formula for the Carbonate ion?

a)

CO 1-

b)

CO3 1-

c)

CO3 2-

d)

CO 2-

10.

Balance the following equation:

___ H2+ ___ O2→___ H2O

a)

1, 1, 3

b)

2, 2, 2

c)

1, 2, 1

d)

2,1, 2

11.
What coefficient should be used to make the following equation balanced?
N2+O2--> _NO 
a)
1
b)
2
c)
3
d)
4
12.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
13.

Choose the answer that shows this equation Balanced


N2 + O2 ----> N2O5

a)

3N2 + O2 ----> 3N2O5

b)

5N2 + 2O2 ----> 5N2O5

c)

2N2 + 5O2 ----> 2N2O5

d)

Cannot be balanced

14.
How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
15.
How many Oxygens are in this molecule? 
(OH)2
a)
4
b)
1
c)
2
d)
3
16.

What is the total number of atoms present in 5Na3PO4?

a)

5

b)

55

c)

40

d)

8

17.

How many Mn atoms are found in the following compound?

2MnO4

a)

1

b)

2

c)

4

d)

8

18.

Name the polyatomic ion: NH4+1

(a)  

19.

Balance this equation:

HgO ---> 2Hg + O2

a)

It is balanced.

b)

2HgO ---> 2Hg + O2

c)

2HgO ---> Hg + O2

d)

HgO ---> Hg + 2O2

20.
Is the following equation balanced?
4Fe + 3O2 --> 2Fe2O3
a)
yes
b)
no
21.
Is the following reaction balanced?
NaHCO3 --> Na2CO3 + H2O + CO2
a)
yes
b)
no
22.
Is the following reaction balanced?
2CH3OH + 3O2 --> 2CO2 + 4H2O
a)
yes
b)
no
23.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__H2SO3 + __KOH--> __H2O+ __K2SO3
a)
2,1 --> 2,1
b)
1,2 --> 1,1
c)
1,2 --> 1,2
d)
1,2 --> 2,1
24.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__Al + __O2--> __Al2O3
a)
4,1 --> 2
b)
4,3 --> 4
c)
3,4 --> 1
d)
4,3 --> 2
25.
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
26.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__CH4 + __O2 --> __CO2+ __H2O
a)
2,1 --> 2,1
b)
1,2 --> 1,1
c)
1,2 --> 1,2
d)
1,2 --> 2,1
27.

What is the formula for the Carbonate ion?

a)

CO 1-

b)

CO3 1-

c)

CO3 2-

d)

CO 2-

28.

Name the polyatomic ion: NH4+1

(a)  

29.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
d)
Left side is balanced
30.
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
31.
Balance this equation
_N2 + _H2 --> _NH3
a)
1,2,3
b)
1,3,2
c)
1,1,2
d)
2,1,1
32.

What is NO3- ?

(a)  

33.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
34.
Balance this equation:
FeS + 2HCl -->
FeCl2 + H2O
a)
FeS2 + 2HCl --> FeCl2 + H2O
b)
It's already balanced
c)
FeS2 + 2HCl --> FeCl2 + H4O
d)
None of these
35.

Apakah formula ion kalsium?

What is the formula of calcium ion?

a)

Ca2+

b)

Ca+

36.

Apakah formula ion zink?

What is the formula of zinc ion?

a)

Zn3+

b)

Zn2+

37.

Apakah formula ion karbonat?

What is the formula of carbonate ion?

a)

CO32-

b)

CO23-

38.

Apakah formula ion sulfida?

What is the formula of sulphide ion?

a)

SO42-

b)

S2-

39.

Apakah formula ion argentum?

What is the formula of silver ion?

a)

Ag+

b)

Ag2+

40.

Apakah formula ion aluminium?

What is the formula of hydroxide ion?

a)

O2-

b)

OH-

41.

Apakah formula ion aluminium?

What is the formula of aluminium ion?

a)

Al3+

b)

Al2+

42.

Mana satu formula yang betul untuk ion oksida?

Which one is the correct formula for oxide ions?

a)

O2-

b)

O-

43.

What is the formula for the Hydroxide ion?

a)

OH -

b)

OH +

c)

HO 1+

d)

HO 4-

44.

Yang manakah formula yang betul untuk ion ferum(II)?

Which one is the correct formula for iron(II) ions?

a)

Fe2+

b)

Fe+

45.

Mana satu formula yang betul untuk ion nitrat?

Which one is the correct formula for nitrate ions?

a)

NO3-

b)

NO32-

46.

Name the polyatomic ion: CO3-2

(a)  

47.

Mana satu formula yang betul untuk ion ammonium?

Which one is the correct formula for ammonium ions?

a)

NH4+

b)

NH42+

48.

Pilih formula ion sulfat yang betul

Choose the correct formula of sulphate ion

a)

SO42-

b)

S2-

49.

Mana satu formula yang betul untuk ion plumbum(II)?

Which one is the correct formula for lead(II) ions?

a)

Pb2-

b)

Pb2+

50.

Mana satu formula yang betul untuk ion bromida?

Which one is the correct formula for bromide ions?

a)

Br-

b)

Br2-

51.

Pilih formula ion litium yang betul

Choose the correct formula of lithium ion

a)

Li+

b)

Li2+

52.

What is the formula for the Oxide ion?

a)

O7 2-

b)

O2 2-

c)

O 2-

d)

O3 2-

53.

Name the polyatomic ion: CO3-2

(a)  

54.

What is the formula for the Hydroxide ion?

a)

OH -

b)

OH +

c)

HO +

d)

HO -

55.

Pilih formula ion sulfat yang betul

Choose the correct formula of sulphate ion

a)

SO42-

b)

S2-

56.

Pilih formula ion hidrogen yang betul

Choose the correct formula of hydrogen ion

a)

H2+

b)

H+

57.

Pilih formula ion kuprum (II) yang betul

Choose the correct formula of copper (II) ion

a)

Cu2+

b)

Cu+

58.

Pilih formula ion magnesium yang betul

Choose the correct formula of magnesium ion

a)

Mg2+

b)

Mn2+

59.

Pilih formula ion barium yang betul

Choose the correct formula of barium ion

a)

Ba+

b)

Ba2+

60.

Pilih formula ion fluorida yang betul

Choose the correct formula of fluoride ion

a)

F-

b)

Fl-

61.

Pilih formula ion iodida yang betul

Choose the correct formula of iodide ion

a)

I-

b)

I2-

62.

What is the formula for the Hydroxide ion?

a)

OH -

b)

OH +

c)

HO +

d)

HO -

63.

Pilih formula ion sulfat yang betul

Choose the correct formula of sulphate ion

a)

SO42-

b)

S2-

64.

What is the formula for the Carbonate ion?

a)

CO 1-

b)

CO3 1-

c)

CO3 2-

d)

CO 2-

65.

What is the formula for the Oxide ion?

a)

O7 2-

b)

O2 2-

c)

O 2-

d)

O3 2-

66.

Name the polyatomic ion: CO3-2

(a)  

67.

What is NO3- ?

(a)  

68.

Name the polyatomic ion: NH4+1

(a)  

69.

aluminum carbonate

a)

Al2(CO3)3

b)

AlCO3

c)

Al(CO3)2

d)

Al4C3

70.

magnesium hydroxide

a)

Mg(OH)2

b)

MgOH2

c)

MgOH

d)

MgO

71.

Match the ion with it's formula

a)

Potassium

1.

K+

b)

Carbonate

2.

CO32-

c)

Copper (II)

3.

Cu2+

d)

Zinc

4.

Zn2+

72.

What is the formula for hydroxide?

a)

OH−OH⁻

b)

O2H−O₂H⁻

c)

OH2−OH₂⁻

d)

O2H2−O₂H₂⁻

73.

Match the following charges with their ions

a)

Ammonium

1.

+1

b)

Calcium

2.

+2

c)

Bromide

3.

-1

d)

Aluminium

4.

+3

74.

What is the formula for nitrate?

a)

NO3−NO₃⁻

b)

NO2−NO₂⁻

c)

NO4−NO₄⁻

d)

NO32−NO₃²⁻

75.

What is the formula for sulfate?

a)

SO42−SO₄²⁻

b)

SO32−SO₃²⁻

c)

SO4−SO₄⁻

d)

SO3−SO₃⁻

76.

What is the formula for ammonium?

a)

NH4+NH₄⁺

b)

NH3NH₃

c)

NH2+NH₂⁺

d)

NH4NH₄

77.

What is the charge on silver ion?

a)

+

b)

2+

c)

3+

d)

3-

e)

2-

78.
Balance this equation:
 2Li + Cl2 -> LiCl
a)
2Li + Cl2 -> 4LiCl2
b)
2Li + Cl2 -> LiCl2
c)
2Li + Cl2 -> 2LiCl
79.
Which problem is balanced?
(Check ALL answers)
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
80.

Balance this equation

_Al +_HCl --> _H2 +_AlCl3

a)

2,6,3,2

b)

it's already balanced

c)

4,12,3,4

d)

2,1,4,5

81.

Balance this equation:

H2 + Cl2 ---> HCl

a)

It is balanced.

b)

H2 + Cl2 ---> 2HCl

c)

3H2 + Cl2 ---> 6HCl

d)

H2 + 3Cl2 ---> 6HCl

82.

Balance the the following 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

83.

Drag and drop the coefficients that balance this equation 2 FeFe   + ​ (a)   Cl2Cl_2  ---->  ​ (b)     FeCl3FeCl_3  

Choose from the below words
3
2
84.

How many HCl molecules do you need to balance this equation?

2Mg + ​ (a)   HCl ---> 2MgCl2 + 2H2

Choose from the below words
4
1
2
3
85.
Balance this equation.
_SnO2 +_H2-->_Sn +_H2O
a)
1,1,2,1
b)
1,2,1,1
c)
1,2,1,2
d)
1,2,2,1
86.

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

87.
Which number should go in the blank?
Al(NO3)3 + _  NaOH -> Al(OH)3 + 3 NaNO3
a)
1
b)
2
c)
3
d)
0
88.

ZnO + H2SO4 --------->

a)

ZnSO4 + H2 + O2

b)

Zn(SO4)2 + H2O

c)

Zn(SO4)2 + H2

d)

ZnSO4 + H2O

89.

Ca(OH)2 + 2HNO3 ------->

a)

Ca(NO)3 + H2O

b)

CaNO3 + H2O

c)

Ca(NO3)2 + 2H2O

d)

Ca(NO3)2 + H2O

90.

Identify the salt in the following equation:


Zn(OH)2 + HNO3 → H2O + Zn(NO3)2

a)

Zn(OH)2

b)

HNO3

c)

H2O

d)

Zn(NO3)2

91.

Which shows a balanced chemical equation for the reaction between magnesium and nitric acid?

a)

Mg + HNO3 -> MgNO3 + H

b)

Mg + HNO3 -> MgNO3 + H2

c)

Mg + 2HNO3 -> MgNO3 + H2

d)

Mg + 2HNO3 -> Mg(NO3)2 + H2

92.

Which shows a balanced chemical equation for the reaction between sulfuric acid and sodium hydroxide?

a)

NaOH + H2SO4 -> NaSO4 + H2O

b)

Na2O + H2SO4 -> Na2SO4 + H2O

c)

2NaOH + H2SO4 -> Na2SO4 + 2H2O

d)

2NaOH + H2SO4 -> Na2SO4 + H2O

93.

Which shows a balanced chemical equation for the reaction between potassium carbonate and hydrochloric acid?

a)

KCO3 + HCl -> KCl + H2O + CO2

b)

K2CO3 + 2HCl -> 2KCl + H2O + CO2

c)

K2CO3 + HCl -> 2KCl + H2O + CO2

d)

K2CO3 + 2HCl -> 2KCl + 2H2O + CO2

94.

Which shows a balanced chemical equation for the reaction between ammonium nitrate and barium hydroxide?

a)

NH4NO3 + Ba(OH)2 -> Ba(NO3)2 + H2O + NH3

b)

NH4NO3 + Ba(OH)2 -> Ba(NH4)2(NO3)2 + 2H2O + 2NH3

c)

2NH4NO3 + Ba(OH)2 -> Ba(NO3)2 + 2H2O + 2NH3

d)

2NH4NO3 + Ba(OH)2 -> Ba(NO3)2 + H2O + NH3

95.

Select the chemical for X in the following equation:

2 HCl + X -> H2O + CuCl2

a)

Cu(OH)2

b)

CuCO3

c)

CuO

d)

Cu

96.

Choose the correctly written chemical equation to represent reaction between Zinc metal which has valency 2 and Nitric acid to form Zinc Nitrate and hydrogen gas ( Nitrate (NO3) has valency 1.

a)

Zn + HNO3 →Zn(NO3)2 + H2

b)

Zn + 2HNO3 →Zn1(NO3)2 + H2

c)

Zn + 2HNO3 →Zn(NO3)2 + H2

d)

Zn + 2HNO3 →Zn1(NO3)1 + CO2

97.

What are the numbers in the questions marks

? Fe2O3 + ? CO --> ? Fe + ? CO2

a)

1,3,2,3

b)

1,2,1,2

c)

1,3,4,2

d)

1,2,3,4

98.

What are the numbers in the questions marks

? FeCO3 + ? HNO3 --> ? Fe(NO3)2 + ? CO2 + ? H2O

a)

1,3,2,3,1

b)

1,2,1,1,1

c)

1,3,4,2,1

d)

1,2,3,4,5

99.

What are the numbers in the questions marks

? (NH4)2SO4 + ? NaOH --> ? Na2SO4 + ? NH3 + ? H2O

a)

1,3,2,3,1

b)

1,2,1,1,2

c)

1,2,1,1,1

d)

1,2,3,4,5

100.

What are the numbers in the questions marks

? (NH4)2SO4 + ? Al(OH)3 --> ? Al2(SO4)3 + ? NH3 + ? H2O

a)

1,3,2,3,1

b)

1,2,1,1,2

c)

1,2,1,3,3

d)

12,1,2,6

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