NEW
Font size
WorksheetsChemical Equations Basics
Total questions: 15
Worksheet time: 15mins
How many HCl molecules do you need to balance this equation?
Mg + __HCl ---> MgCl2 + H2
1
2
3
4
What is the part of the chemical equation in green called?
Fe + S --> FeS
products
reactants
yield
chemical formula
What coefficient should be used to make the following equation balanced?
N2+O2--> _NO
1
2
3
4
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.
Balance this equation.
_CH4 + _O2 --> _CO2 + _H2O
1,2,1,1
2,1,2,1
1,2,1,2
0,2,0,2
Balance this equation
_Al +_HCl --> _H2 +_AlCl3
2, 6, 3, 2
it is already balanced
4, 12, 3, 4
2, 1, 4, 5
The substances listed on the left side of a chemical equation are the
Products
Coefficients
Precipitates
Reactants
Which number should go in the blank?
_ H2 + O2 -> 2 H2O
1
2
3
0
How many Sodium (Na) are in 6NaCl?
1
12
6
How many Hydrogen are in 4H2O?
6
8
2
4
What is the coefficient of water when the equation @@ ext{C}_3 ext{H}_8 + ext{O}_2 ightarrow ext{CO}_2 + ext{H}_2 ext{O}@@ is balanced?
A) 2
B) 3
C) 4
D) 5
Which of the following is a balanced chemical equation?
A) @@ ext{H}_2 + ext{O}_2 ightarrow ext{H}_2 ext{O}@@
B) @@ ext{N}_2 + 3 ext{H}_2 ightarrow 2 ext{NH}_3@@
C) @@ ext{C}_2 ext{H}_4 + ext{O}_2 ightarrow ext{CO}_2 + ext{H}_2 ext{O}@@
D) @@ ext{Fe} + ext{S} ightarrow ext{FeS}_2@@
In the reaction @@ ext{2H}_2 + ext{O}_2 ightarrow ext{2H}_2 ext{O} ,whatistheroleof ext{O}_2@@?
A) Reactant
B) Product
C) Catalyst
D) Inhibitor
What is the sum of the coefficients when the equation @@ ext{C}_2 ext{H}_6 + ext{O}_2 ightarrow ext{CO}_2 + ext{H}_2 ext{O}@@ is balanced?
A) 9
B) 10
C) 11
D) 12
Which of the following represents a combustion reaction?
A) @@ ext{CH}_4 + 2 ext{O}_2 ightarrow ext{CO}_2 + 2 ext{H}_2 ext{O}@@
B) @@ ext{Na} + ext{Cl}_2 ightarrow ext{NaCl}@@
C) @@ ext{H}_2 + ext{Cl}_2 ightarrow 2 ext{HCl}@@
D) @@ ext{Fe} + ext{S} ightarrow ext{FeS}@@
