Remember that one mole of a substance equals the atomic mass, but in grams.

For example: how much mass does one mole of Carbon have?

1.   ?    12.01 grams
2.   ?    12.01 amu
3.   ?    6.02 x 10²³ grams
4.   ?    6.02 x 10²³ amu
5.   ?    6

Instead of constantly saying "How much mass does one mole have?", we say, "Find the molar mass."
"Molar Mass" is the mass of a mole.

Find the molar mass of Calcium.

1.   ?    40.08 grams
2.   ?    20 grams
3.   ?    40.08 amu
4.   ?    20 amu
5.   ?    12.01 grams
6.   ?    6.02 x 10²³ grams

What is the molar mass of carbon dioxide (CO₂)?

1.   ?    44.01 grams
2.   ?    12 grams
3.   ?    32 grams
4.   ?    28 grams
5.   ?    40 grams

What is the molar mass of Iron (Fe)?

1.   ?    55.8 grams
2.   ?    26 grams
3.   ?    52 grams
4.   ?    126.9 grams

Notice that the molar mass is in grams. This is why we use moles: they are units big enough to be used in the lab.

How much does one mole of water weigh?

1.   ?    18.02 grams
2.   ?    17.01 grams
3.   ?    16 grams
4.   ?    10.01 grams

Find the molar mass of K₂O.

1.   ?    94.2 grams
2.   ?    54.2 grams
3.   ?    78.2 grams
4.   ?    16.00 grams
5.   ?    46 grams

How much does one mole of FeCl₃ weigh?

1.   ?    165.3 grams
2.   ?    94.3 grams
3.   ?    71 grams
4.   ?    129.8 grams

Find the molar mass of Sodium Carbonate: Na₂CO₃.

1.   ?    106.01 grams
2.   ?    60.01 grams
3.   ?    94.00 grams
4.   ?    51.01 grams

How much mass does one mole of zinc chloride (ZnCl₂) have?

1.   ?    136.29 grams
2.   ?    65.39 grams
3.   ?    35.45 grams
4.   ?    70.9 grams
5.   ?    100.84 grams

If one mole of Lithium is 6.94 grams. Find the mass of 3 moles of Lithium.

1.   ?    20.82 grams
2.   ?    6.94 grams
3.   ?    13.88 grams
4.   ?    2.31 grams

Now let's make this just a bit harder. Find the mass of 3 moles of carbon dioxide.
(Look back in this quiz if you can't remember carbon dioxide's formula.)

1.   ?    132.04 grams
2.   ?    88.02 grams
3.   ?    44.01 grams
4.   ?    84.03 grams

Find the mass of 5.2 moles of water.

1.   ?    93.65 grams
2.   ?    88.45 grams
3.   ?    83.2 grams
4.   ?    18.01 grams

Find the mass of 2.4 moles of NaOH.

1.   ?    96.02 grams
2.   ?    16.67 grams
3.   ?    40.01 grams
4.   ?    93.6 grams