Video Gallery

How big is a mole? (not the animal)

Go to Video Gallery Added Jun 09, 2017 •

Copy this URL:
Embed code:	<iframe class="edlio-embed-player" type="text/html" width="640" height="360" src="//colliervillehs.colliervilleschools.org/apps/embed/?v=150189" frameborder="0" allowfullscreen></iframe> Change dimensions

Go HD

Show Transcript

okay today we're going to talk about the mall now I know thinking I know what a mole is it's a small furry creature that digs holes in the ground and destroys Gardens and some of you might be thinking that it's a growth on your aunt's face with hair sticking out of it in this case a mole is a concept that we use in chemistry to count molecules atoms just about anything extremely small if you ever wondered how many atoms there are in the universe or in your banana green ass and scientist if I wanted to answer that question but how do you count something as small as an atom in someone had an idea that if you have volumes of gases at the same temperature and pressure contain equal number of particles his name was a Renzo Romano Amedeo Avogadro how long it took sign autographs fortunately fragile most scientists didn't accept the idea of the atom and there was no way to prove use right there was no clear difference between atoms and molecules play Savages work is purely hypothetical and didn't give it much thought but it turned out he was right by late 1860 I forgot it was proven correct in his work helped lay the foundation for the Sonic Theory fortunately I forgot who died in 1856 now the thing is that the amount of particles and even small samples is tremendous for example I have alone if any gas at 0 degrees Celsius and a pressure of 1 atmosphere gas particles E30 Zap2it particles of gas in a container or in scientific notation 6.02 x 10 to the 23rd particles this example is a little misleading because message take up alot of space due to the high kinetic energy of the gas particles and it leaves you thinking atoms are bigger than they really are instead think of water molecules if you pour 18.01 is water into a glass which is 18.01 milliliters which is like 3 and 1/2 teaspoons of water you'll have 602 second-lien molecules of water since Lorenzo nevermind I forgot you was the first one to come up with this idea scientist name the number 6.02 x 10 to the 23rd after him is simply known as I have a guy number back to the mall one of these that are at the magnitude of 602 sectarian this is known as a molar quantity atoms are so small that chemists have bundled them into groups called moles Mozart hard for students to understand because they have a hard time picturing the size of a mole or a 602 sectarian it just too big to wrap our brains around remember our 2.01 milliliters of water love water but how much is that exactly what the second look like maybe that's all exchange the water particles for donuts if you had a mold Donuts they would cover the entire Earth to a depth of 8 kilometers which is about 5 miles you really need a lot of you for that if you had a mole of basketballs you can create a new planet the size of the Earth  if you received a mole Penney's in the day you were born and spent the million dollars second until the day you died at the age of a hundred you would still have more than 99.99% of your money in the bank okay now we have an idea how large a mole so how do we use it might be surprised to know that chemists use the same way you use pounds to buy grapes deli meat or eggs when you go to the grocery store you don't go to the deli counter mask for 43 slices of salami you buy your salami by the pound when you buy your eggs you buy a dozen eggs when we hear the word dozen would probably think of the number 12 we also know that a pair is to a Baker's Dozen is 13 a gross is 144 and a ream of paper is anybody  Arena's 5 will a mole is really the same thing for chemists a mole conjures up the number 6.02 x 10 to the 23rd not a fuzzy little animal princess dealer quantities are more familiar to us so there you have it the story of the mole Avogadro basketballs and how to buy salami at the grocery store

Uploaded by Michelle Martin.

Video Gallery

How big is a mole? (not the animal)

Popular Videos