How many iron and chlorine atoms are there in an 18*mol quantity of FeCl_3?

1 Answer
anor277
Dec 10, 2017

How many eggses in 18 dozen eggs? Are there not 216 individual eggs?

Explanation:

The mole is simply another collective number like a dozen, or a gross, or a score; just as there are "12 items per dozen", there are 6.022xx10^23 "items per mole". Chemists often use the abbreviation N_A to represent this number.

And so we gots an "18 mole quantity" of FeCl_3. Do you agree that CLEARLY there are 54*mol of chloride ions, and "18 mole" of Fe^(3+) ions?

What is the mass of this molar quantity?

And why should we use such an absurdly large number like a mole? If the answer is not immediately apparent, then what is the MASS of 6.022xx10^23 "individual hydrogen atoms?" The mole is thus the link between the sub-micro world or atoms and molecules, to the macro world of grams and litres.....

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