1. Dimensional Analysis
If snow falls at 1.5 in/hour how many mm/minute is that? (1in=2.54 cm)

2. Average atomic mass
Silicon has three different isotopes. The relative abundance and mass of each are:
Si % abundant
Si % abundant
Si % abundant
Calculate the average atomic mass for silicon

3. Density
What is the density of CO gas if 0.196g occupies a volume of 100ml?

4. Density
If a ball with the volume of 215 cm3 has a mass of g, what is the density of the object? Will it float in water? (density of water =1g/ml)

5. What is the evidence for chemical change? (4 things)

6. Homogenous or heterogenous?
Kool-aid
Orange juice with pulp
Pure air

7. Separating a mixture Based on physical properties
How would you separate a mixture of salt and pepper?
How would you separate a mixture of lucky charms?
How would you separate a mixture of sawdust, iron and salt?

9. Element, compound or mixture?
Water
Aluminum foil
Salad
Sulfuric acid
Marker ink
sulfur

11. Frequency and Wavelength
What is the frequency of radiation whose wavelength is 4.32 X 10-9m?

12. Frequency and Energy
Calculate the energy of a wave whose wavelength is 3.56 x 10-7m.

13. Electron configurations
Sulfur
Calcium

14. Lewis Dot Structures for compounds