WorksheetsChemical reactions - Number of atoms, products, reactants
Total questions: 13
Worksheet time: 13mins
Name
Class
Date
1.
How many elements are in this chemical formula?
HCl
a)
1
b)
2
c)
3
d)
4
2.
How many atoms of Carbon are in this formula? C6 H12O6
a)
6
b)
1
c)
12
3.
What is the total number of atoms in this formula? H2O2
a)
2
b)
4
c)
3
4.
How many atoms does Nitrogen (N) have in the following molecule? AgNO3
a)
1
b)
2
c)
3
d)
4
5.
Using the following chemical reaction
Hydrogen + Oxygen --> water
Identify the product(s).
Hydrogen + Oxygen --> water
Identify the product(s).
a)
Hydrogen and oxygen
b)
water
6.
3MnSO3 + MnI4 →
The above are reactants in a chemical reaction. How many atoms of oxygen?
a)
3
b)
1
c)
9
7.
Fe(C5H5)3 How many atoms of hydrogen? (Answer with number only)
(a)
8.
2 Fe(C5H5)2 How many atoms of carbon? (Answer with number only)
(a)
9.
How many elements does PbNO3 have?
a)
2
b)
3
c)
4
d)
5
10.
How many nitrogen atoms does NH3 have?
a)
1
b)
2
c)
3
d)
4
11.
A chemical equation tells us
a)
the reactants and the products.
b)
the elements that make up the reactants and the products.
c)
the number of atoms that make up the reactants and the products.
d)
All of the above.
12.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
13.
Which of the following shows the correct way to balance the chemical equation?
Fe + O2 -> Fe2O3
Fe + O2 -> Fe2O3
a)
4Fe + 3O2 -> 2Fe2O3
b)
2 Fe + 3O2 -> Fe2O6
c)
4 Fe + O6 -> 2Fe2O3
d)
None of the options are correctly balanced.
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