November 18th

A Mole Day Song! (Oh, won't you come and sing along?)

A mole is an animal that burrows in the ground,
Or a spot on your chin that you gotta shave around.
But there's another kind of mole of interest to me,
That's the kind of mole they use in chemistry.
Chorus: A mole is a unit, or have you heard,
Containing six times ten to the twenty-third,
That's a six with twenty-three zero's at the end,
Much too big a number to comprehend.

Say you had a mole of pennies to distribute 'round the world,
Give to each of the five billion grownups, boys, and girls,
There wouldn't be a single person down and out of luck,
Cause everybody in the world would get a trillion bucks.

Or say you had a mole of paper and stacked it toward the sky,
Paper's awful thin, but that pile would get so high.
It'd reach up into outer space, in fact I think you'd find,
It'd go up to the moon and back, eighty billion times.


Chorus: A mole is a unit, or have you heard,
Containing six times ten to the twenty-third,
That's a six with twenty-three zero's at the end,
Much too big a number to comprehend.


Suppose a mole of marshmallows fell upon the planet,
Over each square inch of land and sea, think that you could stand it?
That layer would be twelve miles high and of course block our sun,
We're talking close to five million trillion tons.

Well, maybe we could save ourselves if we all started eaten',
One marshmallow each second, not two 'cause that'd be cheatin',
With forty five billion people munching, how long do you think it'd take?
Forty million years, and that's without a bathroom break.


Chorus: A mole is a unit, or have you heard,
Containing six times ten to the twenty-third,
That's a six with twenty-three zero's at the end,
Much too big a number to comprehend.


But say you had a mole of atoms, would the pile be immense,
Should I say the answer now or leave you in suspense?
Well, atoms are so very small, very small, you understand,
You could hold a mole of atoms in the palm of your hand.

So shake a little sugar in the middle of your palm,
Now you don't want to spill it, so try and stay calm.
You hardly can imagine and barely realize,
There're more atoms in that sugar than stars up in the sky.


Chorus: A mole is a unit, or have you heard,
Containing six times ten to the twenty-third,
That's a six with twenty-three zero's at the end,
Much too big a number to comprehend.



Today's Class:

Atomic mass unit (amu): a way of measuring the mass of a single atom of an element. To find the amu of an element, look for its atomic mass on the periodic table.

For example, chlorine is 35.5 amu.

To find the amu of an ionic compound, add together the amu of each atom of that compound.

For example, Magnesium Oxide would have an amu of 40.3, because magnesium has an amu of 24.3, and oxygen has an amu of 16.0.

If the compound includes two or more atoms of a single element, add each individual atom's amu to the total amu.

Molecular Mass Formula

1 mole of an element is equal to its amu in grams per mole. For example, one mole of fluoride = 19.0g/mol.

Avogardo's Number is a formula which can calculate how many particles there are in a single mole of any amount of substance.

The formula is: 6.022 x 10²³ particles/mol.

Thanks, come again soon!