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........?"#
