## Thursday, December 16, 2010

### If Your Cat took Chemistry, would she Eat this stuff?

1. Jif Creamy Peanut butter- Magnesium Oxide- MgO

2. Delmonte Diced Tomatoes-  Calcium Chloride-
3. Cambell's Chicken Noodle Soup- Sodium Phosphate-

4. Progresso Chicken and Dumplings- Potassium Chloride- KCl

5.Flinstones Sour Gummies- Potassium Iodide- KI

6. Ibuprofen- Iron (II) Oxide- FeO

7. Science Diet Dog Food - Copper (II) Sulfate-
8.Oreo's-  Calcium Phosphate-

9. Innergize Sports Drink- Sodium Chloride- NaCl

10. Wheaties- Calcium Carbonate-
11.Old Spice Body Wash- Sodium Sulfate-

12.Premium Dog Food, Chicken- Zinc Oxide- ZnO

13. Crest Toothpaste- Sodium Fluoride- NaF

14. Theraflu- Calcium Phosphate-
15. Clorox Bleach-  Hydrogen Peroxide-
16. Water-  Hydrogen Oxide-
17. Fire Extinguisher-  Ammonium Sulfate-
18. Power Bar-  Potassium Phosphate-
19. Tropicana Orange Juice-  Calcium Hydroxide-
20. Craft Macaroni and Cheese- Iron (II) Sulfate-

## Thursday, November 11, 2010

### Review packet #13

Q: Explain the difference between precision and accuracy. Suppose you make three different mass measurements of a sugar sample you knew to have a mass of 1 gram. How would you know whether or not the measurements were accurate? How would you know whether or not they were precise? Could the three measurements be precise, but not accurate? Explain.

A: Accuracy is how close a measurement comes to the true value of something; or correctness Precision is how close a series of measurements are to each other. If you knew the mass of sugar was 1 gram and got values of 1,1.02, and .96, these measurements would be accurate but not precise. They are accurate because they are close to 1, however they are not as close to each other. Lets say you get values of 2, 2.01, and 2.01. These values would be precise because they are so close to each other, but not correct or accurate. The values are precise if they are all close to each other. The values are accurate if they are all close to the known CORRECT value:

Here is a picture to help:

## Tuesday, October 5, 2010

### Rutherford's Gold Foil Experiment

Rutherford's Gold Foil experiment was very important in the discovery of the atomic make-up. For more information, here is my Glog:

Work Cited:
1) "Rutherford's Experiment and Atomic Model." The Worlds of David Darling. Web. 07 Oct. 2010. <http://www.daviddarling.info/encyclopedia/R/Rutherfords_experiment_and_atomic_model.html>
2) "Molecular Expressions: Electricity and Magnetism: Interactive Java Tutorial - The Rutherford Experiment." Molecular Expressions: Images from the Microscope. Web. 07 Oct. 2010. <http://micro.magnet.fsu.edu/electromag/java/rutherford/>.

## Thursday, September 9, 2010

### Physical and Chemical Properties of a Fortune Cookie

object I chose for this blog posting is a fortune cookie. A fortune cookie is made of flour, vanilla, sugar, and oil.

Physical Properties

1) A fortune cookie is a solid
2) It has a light gold color
3) Non-malleable
4) Rough Texture
5) Non-soluible

Chemical Properties

1) Flameable
2) Sweet Taste (tested)
3) When exposed to vanilla coke, the fortune cookie became slimy, and bubbles formed around.

4) Microwave-  High temperatures turned the fortune cookie turned flat
5) Clorox Bleach-  reacted by turning the outside foamy and blueish.