Peer Review, Week 1 – Dr. Chapman CHEM 110
Leah Swanzy (lps5@pitt.edu)
1. Define density in words and symbols.
2. What is the mass in grams of an ice cube that is 0.8 inches per side? The density of ice is
0.917g/cm3. Remember that there are 2.54cm in one inch.
3. Accuracy: near the _________________.
Precision: near the __________________.
4. Temperature conversion:
𝑇(𝐾) = 𝑇(℃) + 273.15
𝑇(℃) =
9
𝑇(℉) = ( ) 𝑥 𝑇(℃) + 32
5
𝑇(℃) =
State the boiling point of water:
__________K
__________°F
__________°C
5. Mass vs. Matter
6. Physical Properties
7. Significant Figures:
vs.
Chemical Properties
All digits are significant except zeros at the ______________ of a number and possibly terminal
zeros (one or more zeros at the end of a number).
9.12
0.912
0.0000000912
Terminal zeros ending at the RIGHT of the decimal point _______ significant.
9.00
9.10
90.0
Terminal zeros in a number without an explicit decimal point may or may not be significant.
900
900.
900.0
8. 75 grams of liquid A are poured into a graduated cylinder. 50 grams of Liquid B are added to the
Liquid A. What is the total volume of liquid in the cylinder? Liquid A = 3g/mL and Liquid B =
2g/mL.
9. Atomic structure
10.
23
Na
11
11. Define isotope:
Mini-Quiz:
1. Convert pounds per cubic feet to grams per cubic centimeter.
2. Convert 72°F into Kelvin and Celsius.
3. How many sig figs are in
a. 0.08
b. 808
c. 80
d. 80.
4. List one chemical property (don’t peek back!)