Download For each formula, name the elements present and give the number

Building Skills 3
pp. 30-31 Practice
Problems
For each formula, name
the elements present
and give the number of
atoms of each element.
BaF2
ANSWER!
• Barium (Ba): 1
• Fluorine (F): 2
For the following
equation give an
atom inventory:
N2 + 3 H2  2NH3
Reactants
N-2 H-6
Products
N-2
H-6
For each formula, name
the elements present and
give the number of atoms
of each element.
H2O2
• Hydrogen (H): 2
• Oxygen (O): 2
For the following
equation give a
molecule inventory:
N2 + 3H2  2NH3
One nitrogen
molecule & three
molecules of
hydrogen yields two
molecules of
ammonia (NH3).
For the following
equation give an
atom inventory:
O2 + 2H2 2 H2O
Reactants
O-2
H-4
Products
O-2
H-4
For each formula, name
the elements present
and give the number of
atoms of each element.
CaSO4
- Calcium (Ca): 1
- Sulfur (S): 1
- Oxygen (O): 4
What are
subscripts?
The lower case
numbers in a formula
(the number 2 in H20)
For each formula, name
the elements present and
give the number of atoms
of each element.
Al2SO4
-Aluminum (Al):2
-Sulfur (S):1
Oxygen (O):4
For the following
equation list the
reactants:
O2 + 2 H 2  2 H 2 O
O2
&
H2
For each formula, name
the elements present and
give the number of atoms
of each element.
NH4NO3
•Nitrogen (N):2
•Hydrogen (H):4
•Oxygen (O):3
What is a
coefficent?
The large number
out in front of a
formula (like 2 in
front of the 2
H2O).
For each formula,
name the elements
present and give the
number of atoms of
each element.
Li2CO3
-Lithium
(Li): 2
-Carbon (C): 1
-Oxygen (O): 3
For the following
equation give a
molecule inventory:
CH4 +4O2 CO2+ 2H2O
One methane (CH4)
and four oxygen
molecules yield one
carbon dioxide and
two water
molecules.
For each formula, name
the elements present and
give the number of atoms
of each element.
(NH4)3PO3
-Nitrogen (N): 3
-Hydrogen (H): 12
-Phosphorus (P): 1
-Oxygen (O): 3
List the reactants in
the following
equation:
N2 + 3 H2 2 NH3
N2
&
H2
4NH3+ 7O2 4NO2 + 6H2O
Copy this equation.
1. Underline the
coefficients.
2. Circle the molecules.
Coefficients:
4NH3+ 7O24NO2 +6H2O
Molecules:
NH3
NO2
O2
H20
For each formula,
name the elements
present and give the
number of atoms of
each element.
HC2H3O2
-Hydrogen (H): 4
-Carbon (C): 2
-Oxygen (O): 2
List the products in the
following equation:
CH4 + 4O2 CO2 + H2O
For each formula, name
the elements present and
give the number of atoms
of each element.
Na2O
ANSWER!
• Sodium (Na): 2
• Oxygen (O): 1
For each formula, name
the elements present and
give the number of atoms
of each element.
Al2O3
ANSWER!
• Aluminum (Al): 2
• Oxygen (O): 3