Make-Up Lab
Name___________________________
Period______
Lab: Mole Calculations
Purpose: To determine the number of moles and “particles” from the mass of a variety of substances
Procedures
1. Determine the molar mass of each substance. Show your calculations in the table below.
2. Determine the mass of each substance using the electronic balance.
3. Calculate the number of moles of each substance. Show your calculations in the table below.
4. Calculate the number of “particles” of each substance. Show your calculations in the table below.
Observations
Substance
Chemical
Formula
1 packet salt
NaCl
1 sugar cube
C12H22O11
1 iron nail
Fe
1 scoop of
baking soda
NaHCO3
50 mL water
H2O
Molar Mass
(g/mol)
Mass (g)
0.79
3.73
5.29
0.64
49.72
Moles (mol)
# of Particles: (atoms,
molecules or formula units)
Questions: Show your Work Box your Answers, please
1. How many moles of sodium chloride would be present in a 10.0 kg bag of salt?
2a. If the dimensions of the sugar cube are 1.0 cm x 1.0 cm x 1.0 cm, what is the volume of the cube?
2b. What is the density of the sugar cube?
3a. The amount of iron required per day for the average person is 15 mg. How many moles of iron is this?
3b. How many atoms of iron is this?
4.
How many atoms of oxygen are present in the scoop of baking soda?
5a. Your body is approximately 75% water by mass. What is the mass of the water in your body?
5b. What is the approximate number of water molecules in your body?
Conclusion
1. To convert from mass to moles _____________________by the _______________________
2. To convert from moles to mass _____________________by the _______________________
3. To convert from particles to moles _____________________by _______________________
4. To convert from moles to particles _____________________by ______________________
Notes:
1000g = 1 kg

1000mg = 1 gram

453.59 grams = 1 pound

density = mass/volume