Hemet High ● Chemistry
Name: _________________________Pd:___
3 ● Atoms: The Building Blocks of Matter
Grams, Moles, and Atoms Conversion Worksheet
There are two mole equalities. They are:
1 mol = 6.02 x 1023 atoms
1 mol = _____grams (mass from periodic table)
Each equality can be written as a set of two conversion factors. They are:
 6.022 x1023 atoms 


1 mole




or
23

1 mole
 6.022 x10 atoms 


 _____ grams 
 1 mole



 or 
 _____ grams 
 1 mole

Mole-Atoms Conversions
Example 1: How many moles of magnesium is 3.01 x 1022 atoms of magnesium?
 3.01x1022 atoms Mg 


1




1 mole Mg

 = 5.00 x 10-2 moles Mg
23
 6.022 x10 atoms Mg 
Example 2: How many atoms are there in 4.00 moles of carbon?
 4.00 moles C 


1


 6.022 x1023 atoms C 

 = 2.41 x 1024 atoms C
1
mole
C


1. How many moles are 1.20 x 1025 atoms of phosphorous?
2. How many atoms are in 0.750 moles of zinc?
3. How many atoms are in 0.400 moles of sulfur?
Mole-Grams Conversions
Example 3: How many moles in 28.0 grams of neon?
 28.0 g Ne   1 mole Ne 
 = 1.39 moles Ne

 
1

  20.18 g Ne 
Example 4: What is the mass(grams) of 5.50 moles of iron?
 5.50 moles Fe   55.85 g Fe 
 = 307 grams Fe

 
1

  1 mole Fe 
4. Find the number of moles of argon in 452 g of argon.
5. Find the grams in 1.26 x 10-4 mol of sodium.
6. Find the mass (grams) in 2.60 mol of lithium.
Mass-Mole-Atom Conversions
Example 5: How many atoms are in 3.36 g of silicon?
23
 3.36 g Si   1 mole Si   6.022 x10 atoms Si 

 = 7.20 x 1022 atoms Si






1
1 mole Si

  28.09 g Si  

Example 6: Find the mass in grams of 2.00 x 1023 atoms of aluminum?
 2.00 x10 23 atoms Al  
  26.98 g Al 
1 mole Al

 
 
 = 8.96 g Al
23
1

  6.022 x10 atoms Al   1 mole Al 
7. How many atoms are in 52.3 g of calcium?
8. Find the mass, in grams, of 1.00 x 1023 atoms of cobalt.
9. How many atoms are there in 14.3 g of xenon?