Moles in Chemistry

^{*AVOGADRO'S NUMBER*
6.02 X
10²³
Mole (mol)-
"the amount of a substance that contains 6.02 x 10^{23 (avogadro's number)
representative particles of that substance. All atoms and molecules are counted out into 'moles.' Every mole contains Avogadro's
Number of particles. Avogadro's Number is a constant, in the way that every mole has this many particles.}}

^{1 mole of carbon weighs
12g, and contains}6.02 x 10^{23 atoms.}
^{1 mole of magnesium weighs 24g,
and contains}6.02 x 10^{23 atoms.}
^{1 mole of gold weighs 197g, and contains}6.02 x 10^{23 atoms.}

^{*Key Points to Remember*}

^{mole= n= Avogadro's # = atomic weight= formula weight}
^{the molar mass of any substance is the mass in grams of one mole
of the substance}
^{the mass of one mole of an ionic compound is hte gram forumla mass}
^{the gram atomic mass is the atomic mass of an elment expressed in
grams}
^{by multiplying the number of moles of a subtance by the substance's
molar mass, the result is the mass of that substance}
^{by dividing the mass of any substance by its molar mass, the result
is the amount of moles of that substance}
^{one mole of any gas at STP has a
volume of 22.4 L}

^{*Solving Mole Problems:}

No. of moles = Mass of substance (in grams)

^{Molar
mass}

^{ex: 6.3n C (6.3 moles of Carbon) =? gC (are equal to how many grams of carbon)}

^{1. Write your Known: 6.3nC}

^{2. Setup/label conversion factor: 6.3nC x 12g C/ 1nC= 75.6gC}

^{3. Equality (moles carbon = g of carbon)}

Amede Avogadro

(Amédéo Di Quaregna E Ceretto, comte d'Avogadro)

1776-1856

*Amede Avogadro was born in Turin, Italy, August 9, 1776. He came from a family of well established church lawyers. His parents pushed him into a path of being a lawyer, Ge became a bachelor of jurisprudence in 1792 at the age of only 16. Later on, about 4 years after, he worked hard to earn a doctoratein ecclesiastical law and started to practice. Even though he was in a succesfful legal career, he was interested in mathematics and phyrics. He began privately studying these subjects and performed his first scientific research project on electricity in 1803. In 1809 he achieved the position of Professor of Natural Philosophy at the College of Vercell. Until 1850 when he retired, he was appointed and carried out his job as being the first chair of mathematical physics in Italy at the University of Turin.

Further Resources:

Home: http://www.freewebs.com/quarterdave25/

Mole Sites: http://www.elecuter.co.uk/Scinet/chemistry/el/moles.php

http://antoine.frostburg.edu/chem/senese/101/moles/index.shtml#notes

http://chemistry.about.com/cs/generalchemistry/f/blmole.htm