Question

Mr. Avogadro has set up 4 jars with one mole of each the following substances:

1. Iron
2. Sodium Chloride
3. Sodium Bicarbonate (NaHCO3)
4. Aluminum
His clever and intelligent students notice that all of the amounts of the various
substances are different from one another, even though they are all ONE MOLE.
Explain the reason why each amount in the jar is different in terms of the mole. Then,
calculate the molar mass for each of the substances. Circle your your answers and
include the unit used for molar mass.

Answer 1

Although they have the same mole, they have different molar masses because of their chemical composition.

1. Iron: 55.845 g/mol

2. Sodium Chloride: 58.44 g/mol

3. Sodium Bicarbonate (NaHCO3): 84.006 g/mol

4. Aluminum: 26.982 g/mol

Step-by-step explanation:

Use the periodic table to determine their molar masses by looking at the atomic mass of each element

1. Given

2. 22.99 (Na) +35.45(Cl) =58.44

3. 22.99(Na)+1.008(H)+12.011(C)+[3*15.999 (O)] = 84.006

Notice how O is multiplied by 3 because there are 3 atoms of oxygen

4.Given