This is national Chemistry Week. It"s constantly chosen come coincide through whichever calendar week consists of October 23 (or 10/23), since October 23 is "Mole Day".

You are watching: 6.02 x 10 to the 23rd power

"Huh? Why would certainly chemists storage a furry critter that burrows underground?"

Not the mole. The mole chemistry celebrate is a unit.

1 mole = 6.02 x 1023 of every little thing it is you desire a mole of.

You can think the a mole together being type of the chemists" tantamount of a dozen -- it"s a practically sized bundle for working with the type of ingredient chemists job-related with, namely, atoms and molecules. If they to be working v eggs, or shoes, or some various other stuff, castle would most likely use a various unit than the mole.

Remember the atoms are really, really small. They room so small that you"ve never seen one with your naked eye. (Depending on how you score things choose diamonds, girlfriend may have seen a molecule through your naked eye, however even many molecules are means beyond the boundaries of her visual acuity.) If passing intro chem depended upon doing experiments whereby you had actually to sweet out single atoms of reagents, there would be no chemists.

Weighing out 6.02 x 1023 atoms, though, is do-able. 6.02 x 1023 atom of carbon weigh 12.01 grams. 6.02 x 1023 atoms of copper weigh 63.55 grams. 6.02 x 1023 atoms of helium sweet 4.003 grams.

I don"t have any of this memorized. I simply turned to my handy, dandy periodic table. Under every element"s price is provided an atom weight. Carbon"s atomic weight is 12.01. That method a solitary atom the carbon has actually a fixed of 12.01 atom mass systems (amu). However, because we"ve already detailed that you hardly ever want to address one atom in ~ a time (at the very least if you"re a chemist -- perhaps physicists would fairly deal with single atoms), the more important truth that you deserve to glean indigenous the table is that 6.02 x 1023 atom of carbon have a mass of 12.01 grams. Or, simply, 1 mole the carbon is 12.01 g.

Once you acknowledge that atom masses tell friend how plenty of grams in a mole of an element, you can measure your preferred amount of multi-element molecules, too. Table salt is NaCl. Na has atomic fixed of 23, Cl has atomic mass of 35.5, therefore a mole that NaCl (or 6.02 x 1023 molecule of NaCl) is 58.5 g. To discover the fixed of a mole of H2O, you have actually 2 moles of H (atomic load 1) and one the O (atomic weight 16) -- 18 g the H2O holding all 6.02 x 1023 molecules.

From this, it"s a great bet the mixing an equal variety of moles of table salt and also water will not productivity a saline systems so much as a slightly damp pile of salt.

In enhancement to being the number of atoms or molecules (or shoes, or eggs, or pencils, etc.) in a mole, 6.02 x 1023 has actually a name that sticks in people"s heads: Avogadro"s number. Avogadro additionally has a law:

Equal volumes of gases at the very same temperature and also pressure save on computer the same number of molecules.

If we"re handling "ideal gases (gases who molecules room not also enormous, and also which don"t have significant attractions between the molecules), at standard temperature and pressure (0 o C and also 1 atm), 22.4 liters that gas will contain 6.02 x 1023 molecule (or 1 mole). So, at typical temperature of pressure, balloons filled through 22.4 together of H2, N2, O2, Cl2, He, Ne, and also Ar will each save a mole that gas molecules. However, the masses the gasses in this balloons will certainly be different (2 g, 28 g, 32 g, 71 g, 4 g, 20 g, and also 40 g, respectively). This method a mole that argon is denser -- through a lot of -- than a mole of helium.

See more: The Epicardium Is Another Name For The English Dictionary, Medical Definition Of Epicardium

That Avogadro"s number of equates to a mole that has additionally given rise to clever marketing, like this:


The brand clarifies that there space not in reality 6.02 x 1023 avocados in every package of agakmall (it"s closer come 5 or 6). But it"s a fine store bought guacamole, and also the chemistry hoax on the package simply makes it much more appealing.