# CC Unit 8_Mole Refresh_2014 ```Name: __________________________________ Date: _______________________
Period: ___________
Unit 8: Mole Refresher
Part A - Molar Mass
1. What is the molar mass of an element?
2. How is the molar mass of a compound different than that of an element?
3. Determine the molar mass of the following:
a. Titanium - _________
c. Nitrogen - _________
b. Carbon Dioxide - _________
d. Dibromide - _________
Part B - Converting Moles to Particles:
4. Elements: 1 mole = ___________________
5. Compounds: 1 mole = ___________________
6. Why do we use moles in chemistry?
Part C - Dimensional Analysis
Steps for Converting with Dimensional Analysis:
Sample Problem: How many centimeters are in two
Step 1: Write down starting amount with units
inches if 2.5 cm = 1 inch
factor
Step 3: Fill in your units above &amp; below the _______

to cancel units they must be diagonal
Step 4: Fill in the numbers next to units based on
their equality
with correct units


if a number is on top you multiply by it
if a number is on bottom you divide by it
Conceptual Chemistry
Name: __________________________________ Date: _______________________
Period: ___________
Conversions with Moles
Using:
Using:
7. You have 2.3 g of C. Convert to moles.
8. You have 5.1 mol of N. Convert to grams.
9. You have 7.022 x 1023 atoms of O. Convert to
10. You have 2.5 mol of Li. Convert to atoms.
moles.
11. You have 1.21 x1024 molecules of H2O. Convert
12. You have 2.3 mol of H2. Convert to molecules.
to moles.
13. You have 21.3 g of F2. Convert to moles.
Conceptual Chemistry
14. You have 3.1 mol of HCl. Convert to grams.
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