WorksheetsProperty changes in chemical reactions,
Total questions: 20
Worksheet time: 10mins
................... is a description of a reaction using element symbol and chemical formula
a chemical equation
a chemical structure
In a chemical equation, on what side of the arrow are the reactants?
right
left
In a chemical equation, on what side of the arrow are the products?
right
left
True or False? During a chemical reaction a new substance (or substances) is produced.
True
false
Count the total number of atoms in the chemical formula: 5H2O2
5
8
10
20
Identify the total number of molecules in the chemical formula: 6CH4
5
10
6
20
.
Which of the following can be changed to balance a chemical equation?
products
element symbols
coefficients
subscripts
.
A chemical equation is balanced when the number of each type of __________ is the same on both sides of the yield sign.
compound
molecule
atom
fotmula
Which of the following equations is balanced?
2H2 + O2 ---> H2O
H2 + 2O2 ---> 2H2O
H2 + O2 ---> H2O
2H2 + O2 ---> 2H2O
Which coefficient will balance the following equation?Zn + ___ HCl --> ZnCl2 + H2
2
4
6
3
How many atoms of hydrogen are in the following chemical formula? 3Mg(OH)2
5
6
1
2
Which coefficient will balance the following equation? ____ Ca + N2 → Ca3N2
6
3
2
8
What is a coefficient?
The large number to the left of a chemical formula.
The small number on the left of a chemical symbol
Which chemical equation is balanced?
Li + F2 → 3LiF
2Li + F2 → 2LiF
2Li + F2 → LiF
What is the total number of atoms present in 5Na3PO4?
5
40
60
55
How many atoms of aluminum are on each side of the yield sign in the following equation? 4Al + 3O2 --> 2Al2O3
2
1
6
4
Is the following equation balanced or unbalanced? Fe + S --> FeS
True
False
Which of the following is the correct balanced equation for the unbalanced equation shown? ____ H2 + ____ Cl2 --> ____ HCl
2H2 + Cl2 --> 4HCl
H2 + Cl2 --> 2HCl
What is the part of the chemical equation in green called? Fe + S --> FeS
products
reactant
What is the part of the chemical equation in green called? H2 + O --> H2O
reactants
product
