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Oct 23 2015

How Many Moles in a Mole?

Posted on October 23, 2015October 20, 2017 by Darlene Kaskie

It is National Mole Day! 

Sorry cute (?), burrowing creature, it isn’t your day.

National Mole Day is celebrated by chemists and chemistry students on October 23rd. The mole is honored between 6:02 a.m. and 6:02 p.m. This makes the date 6:02 10/23, And where did that number come from and why does it deserve it’s own day?

6.02×10^23 is called the Avogadro Constant and it defines the number of particles (atoms or molecules) in one mole of substance.

Periodic Table
Periodic Table

The mass of a mole of substance is called the molar mass. The molar mass is used to convert grams of a substance to moles. The molar mass of an element is found on the periodic table, and it is the element’s atomic mass in grams/mole (g/mol). An interactive periodic table can be found here:  http://chemistry.about.com/library/blperiodictable.htm. To explore calculating the mass of a single atom, you will also need to know the atomic mass. Want to try calculating an atomic mass? You can find an interactive example here: http://chemistry.about.com/od/workedchemistryproblems/a/avogadroexampl1.htm

In simple terms, a mole of anything is always 6.02×10²³. This invented unit is a consistent and convenient measuring unit much like saying a dozen or a byte.

How to celebrate National Mole Day, you ask? 

Chemistry for Today
Chemistry for Today Engineering Library FOLIO QD31.3 .S42 2014

1. Read a one of our many chemistry books! We have lots of resources, including:

Corwin, Charles H., Introductory Chemistry : Concepts and Critical Thinking, 7th edition. Boston : Pearson, 2014. Engineering Library FOLIO QD33.2 .C67 2014

Seager, Spencer L. Chemistry for Today : General, organic, and biochemistry. Belmont, CA : Brooks/Cole, 2014. Engineering Library FOLIO QD31.3 .S42 2014

2. Test your Mole knowledge by taking this quiz.

3. Tell mole jokes.

Where did Avogadro stay on is vacation? A mole-tel.
What do chemists wear when it’s cold? Ther-mole underwear.

4. Try a mole experiment.

5. Watch a New York Times science video about moles.

Resources:

Amedeo Avogadro Biography. The Famous People. Accessed Oct. 22, 2015

What Is a Mole and Why are Moles Used?. 2015.  About Education.

 

Posted in Blog, National "Holidays"

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