Advanced Honors /Honors Chemistry: Atom Mass and Introduction to the Mole Guided Notes
Atomic Mass
•
______________ number listed on periodic table.
•
___________________average of all the ____________________ occurring isotopes of that element.
•
_______________________ has this exact mass.
Counting Atoms and the Mole

A _____________________ measures the number of particles within a substance.

A mole refers to a specific number of particles. (_____________ Unit)

1 mole = __________________ particles

6.02 x 1023 is also known as _____________________ number.
 1 mole aluminum
 1 mole copper
 1 mole lead
= _________________ Al atoms
= _________________ Cu atoms
= _________________ Pb atoms

Although 1 mole always contains the same number of particles, the ______________ of one mole varies
depending on the substance.

__________________ – mass of one mole of a substance.

Mass of one mole of an element is equal to its ____________________ expressed in grams.
 1 mole of aluminum
= ________________ grams
 1 mole of copper
= ________________ grams
 1 mole of lead
= ________________ grams
•
A ___________________________ is a ratio of equivalent measurements used to convert from one
unit to another. They are written in the form of a ___________________.
Label
Mole
Atoms
Grams (mass)
Number Used in Conversion Factor
What Do You Think?
1. Determine the number of moles that are contained in 2.65 g of fluorine (F).
2. How many atoms are found in 6.53 mol chlorine (Cl)?
3. Determine the mass, in grams, of 8.29 x 1022 atoms of cobalt (Co).
4. Calculate the number of moles found in 8.49 x 1024 atoms oxygen (O).
5. Calculate the mass, in grams, of 0.0845 mol argon (Ar).
6. How many atoms are contained in 17.63 g of aluminum (Al)?
7. Calculate the mass, in grams, of 3.07 x 1024 atoms of sulfur (S).
8. Determine the number of silver atoms that are contained in 0.650 mol Ag?
9. A chemist produced 11.25 g of magnesium, Mg. How many moles of magnesium were produced?