# Masses of Chemicals and conversions

```Name: _______________________________________
Period: ______
Date: ________
H2O
Step 1: Find the mass of
each element in the
formula using the periodic
table.
H=
Step 2: Find the number of
atoms of each element in
the chemical formula
H=
Step 3: Multiply the mass
times the number of atoms
to get the total mass from
each element.
H=
X =
O=
O=
O=
Step 2: Find the number of
atoms of each element in
the chemical formula
Step 3: Multiply the mass
times the number of atoms
to get the total mass from
each element.
=
X =
X
individual masses to find
the mass of the whole
chemical.
H2O =
=
C12H22O11
Step 1: Find the mass of
each element in the
formula using the periodic
table.
=
=
=
=
=
X
=
=
=
=
X
=
individual masses to find
the mass of the whole
chemical.
=
NaCl
Step 1: Find the mass of
each element in the
formula using the periodic
table.
=
=
Step 2: Find the number of
atoms of each element in
the chemical formula
=
=
Step 3: Multiply the mass
times the number of atoms
to get the total mass from
each element.
=
X =
=
X
individual masses to find
the mass of the whole
chemical.
=
=
NaHCO3
Step 1: Find the mass of
each element in the
formula using the periodic
table.
=
Step 2: Find the number of
atoms of each element in
the chemical formula
=
Step 3: Multiply the mass
times the number of atoms
to get the total mass from
each element.
=
X
=
=
=
=
X
=
=
=
=
X
=
=
=
=
X
=
individual masses to find
the mass of the whole
chemical.
=
Al2(SO4)3
Step 1: Find the mass of
each element in the
formula using the periodic
table.
Step 2: Find the number of
atoms of each element in
the chemical formula
Step 3: Multiply the mass
times the number of atoms
to get the total mass from
each element.
individual masses to find
the mass of the whole
chemical.
1. How many molecules are in 13.5 g of sulfur dioxide, SO2?
2. What is the mass of 2.23 x 1023 atoms of sulfur?
3. How many formula units of silver fluoride, AgF, are equal to 42.15 g of this substance?
4. What is the mass of 8.83 x 1023 formula units of Iron (III) oxide, Fe2O3?
```

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