Homework Assignment #8
Dimensional Analysis – Moles (Factor Labeling Method)
1. Determine the number of representative particles in each of the following. Note: answers in scientific
notations with three significant digits.
a. 0.425 mol nitrogen gas molecules (N2)
b. 3.4678 x 10-4 mol water molecules
2. Determine number of moles in each of the following. Note: answers in scientific notations with three
significant digits.
a. 4.96 x 1024 molecules of glucose
b. 1.56 x 1023 formula units of sodium hydroxide
3. Make the following conversions. Note: answers in scientific notations with three significant digits.
a. 1.51 x 1015 atoms Si to mol Si
b. 4.25 x 10-2 mol H2SO4 to molecules H2SO4
c. 8.95 x 1025 molecules CCl4 to mol CCl4
d. 5.90 mol Ca to atoms Ca
4. How many molecules are contained in each of the following? Note: answers in scientific notations
with three significant digits.
a. 1.35 mol carbon disulfide (CS2) []
b. 0.254 mol diarsenic trioxide (As2O3) []
c. 1.25 mol water []
d. 150.0 mol HCl []