"a. How many sulfur atoms in a 6 mole quantity of sulfur atoms?"a. How many sulfur atoms in a 6 mole quantity of sulfur atoms? "b. How many sulfur atoms in a 6 mole quantity of"b. How many sulfur atoms in a 6 mole quantity of S_8S8 "molecules?"molecules?

"c. How many atoms in a 5 mole quantity of sulfur dioxide?"c. How many atoms in a 5 mole quantity of sulfur dioxide?
"d. How many atoms in a 2 mole quantity of sulfur dioxide?"d. How many atoms in a 2 mole quantity of sulfur dioxide?

1 Answer
May 13, 2017

You know, I could replace "moles"moles by "dozens"dozens here and get the right answer.

Explanation:

The mole is just another number, admittedly it is a very large number, N_A=6.022xx10^23*mol^-1NA=6.022×1023mol1. Let's do the problem by using "dozens"dozens: "1 dozen"="12 items of stuff"1 dozen=12 items of stuff.

a.a. "6 dozen S atoms"6 dozen S atoms -= "72 sulfur atoms"72 sulfur atoms

b.b. "2 dozen"2 dozen S_8S8 "atoms"atoms -= "192 sulfur atoms"192 sulfur atoms

c.c. "5 dozen"5 dozen SO_2SO2 "molecules"molecules -= "60 sulfur atoms"60 sulfur atoms and "120 oxygen atoms"120 oxygen atoms.

d.d. "2 dozen"2 dozen CO_2CO2 "molecules"molecules -= "24 carbon atoms"24 carbon atoms and "48 oxygen atoms"48 oxygen atoms.

And the answer is clearly b.b. Are you following me?