What is a #"mole"#?

1 Answer
Jul 4, 2017

Answer:

Well #"one mole"# is A NUMERICAL TERM.............

Explanation:

And this question is PRECISELY AKIN to asking............

#"How many eggs are there in a dozen eggses.......?"#

So.............

#"How many oxygen atoms are there in a mole of ethyl alcohol....?"#

#....................."H"_3"CCH"_2"OH"...................#

Why, #"ONE MOLE"# because in a #46*g# mass of ethyl alcohol, there is a #16*g# mass of oxygen atoms. And there are in addition #"2 MOLES"# of #"carbon atoms"#; and #"8 MOLES"# of #"hydrogen atoms"# in that molar quantity of ethanol...... And the combined masses of these elements is approx. #46*g#. Are you with me?

A mole specifies #"Avogadro's no."# of atoms, #6.022xx10^23*mol^-1#. Why do we use such an ABSURDLY large number? Because it is the link between the sub-micro world of atoms and molecules, to the macro world of grams, kilograms, and litres....... One #"mole of"# #""^1H# #"atoms"# of #"hydrogen atoms"#, #""^1H#, has a mass of #1*g#. One #"mole of"# #""^12C# #"atoms"#, #""^12C#, has a mass of #12*g#. And one #"mole of"# #""^16O# #"atoms"#, #""^16O#, has a mass of #16*g#. And one #"mole of"# of ethanol molecules, #C_2H_5OH#, has a mass of #46*g#......This mass equivalence is why we use the mole.

Are you following me?

#"So how many eggses are there in a dozen eggs........?"#