I want a Number and Guacamole Named after Me

Hey sorry for the late post but this is for yesterdays.

To start of the day we went over the test we took on Friday and were told if we needed any help naming, the best thing to do was practice and more practice. After that we started looking at our notes about Avogadro's number. That number would be the mole. Is written in scientific notation as 6.02x10^23 or 602 billion trillion or 602,000,000,000,000,000,000,000. My recommendation is to keep it in scientific notation. The mole is only used when talking about Particles and molecules, things that are REALLY small. The mole is used in the same way that a dozen is used.

Ø 1 dozen cookies=12 cookies

Ø 1 mole of cookies=6.02x10^23

Ø 1 dozen cars=12 cars

Ø 1 mole of cars=6.02x10^23

The number will always be the same but the mass will be different. on a side note- mole is abbreviated as "mol" but in liebs class we feel that we deserve our own symbol that is shorter and more convenient so we chose a circle with a line through it. I would post the notes here but I can’t find them, they are not on slide share so I will just go on to conversions.

6.02x10^23/ 1 mol OR 1 mol/ 6.02x10^23 will always be used it depends on what you are trying to get. I will discuss which one to use in the section about general concepts below.
After we talked about Avogadro's number we went on to molar mass.

Molar mass is the mass of 1 mole in grams. This number is equal to the numerical value of the atomic mass found on the periodic table. For example:

Ø 1 mole of H atoms = 1.008g

Ø 1 mole of C atoms = 12.0g

Ø 1 mole of Bi atoms = 209.0g

As i am finishing up i will end with some general concepts to keep in mind when dealing with calculations involving moles

Ø For moles to particles, multiply by Avagadro's number (mole)

Ø For particles to moles, divide by Avagadro's number (mole)

Ø For grams to moles, divide by molar mass

Ø For moles to grams, multiply by molar mass

Well I am done for now - if you want to get a sense of how big a mole actually is you can check this out, http://www.youtube.com/watch?v=1R7NiIum2TI . This video is just showing how insanely big a mole is. Have fun

The next scribe is me. so until later tonight, have fun working on the worksheets we got and studying for the quiz tomorrow over conversions using moles and such and dimensional analysis.