The Mole Calculations Using Molar Mass

The Mole Calculations Using Molar Mass

by Clelia Sandino

Collection terms​

​1 trio =  3 singers

1 six-pack Cola = 6 cans Cola drink

1 dozen donuts = 12 donuts

1 gross of pencils=144 pencils

​A Mole of Particles

​Contains 6.02 x 10²³ particles 

1 mole C   =  6.02 x 10²³ C atoms

1 mole H2O  =  6.02 x 10²³ H₂O molecules

1 mole NaCl    =  6.02 x 10²³ Na⁺ions and 6.02 x 10²³ Cl^- ions

​​Moles of elements

​

1 mole Mg = 6.02 x 10²³ Mg atoms

1 mole Au = 6.02 x 10²³ Au atoms

Moles of compounds

1 mole NH₃ = 6.02 x 10²³ NH₃ molecules

1 mole C₉H₈O₄ = 6.02 x 10²³ aspirin molecules

​Conversion Factor

​6.02 x 1023 particles

1 mole

or

1 mole

6.02 x 1023 particles

Multiple Choice

Suppose we invented a new collection unit called a mep.  One mep contains 8objects

    How many paper clips in 1 mep?

• 1

• 4

• 8

• 20

Multiple Choice

Suppose we invented a new collection unit called a mep.  One mep contains 8 objects How many paper clips in 1 mep?

• 2

• 4

• 8

• 16

Multiple Choice

   How many meps contain 40 gummy bears?   

• 2

• 5

• 10

• 20

Multiple Choice

Number of atoms in 0.500 mole of Al

•  500 Al atoms

    

• 6.02  x $$10^{23}$$   Al atoms

• 3.01 x 10 $$10^{23}$$  Alatoms

Multiple Choice

Number of moles of S in 1.8 x $$10^{23}$$  S atoms

• 1.0 mole S atoms

• 3.0 mole S atoms

• 1.1 x mole S atoms

​Number of grams in 1 mole

Number of grams in 1 mole

Equal to the numerical value of the atomic mass

1 mole of C atoms = 12.0 g

1 mole of Mg atoms = 24.3 g

1 mole of Cu atoms = 63.5 g

Multiple Choice

1 mole of Br atoms

Give the molar mass to 0.1 g

• 79.9 g/mole

• 6.022 x  $$10^{23}$$  g/mol

​Molar Mass of Compounds

​

M