Question

What is the number of representative particles in 7.50 mol `SO_2`?

Answer 1

The mole is simply a number, `N_A` `=` `6.022140857xx10^23*mol^-1`

Explanation:

So if there are `7.50` `mol` `SO_2` molecules; there are `7.5xxN_A` individual `SO_2` molecules, and in that quantity there are `7.5xxN_A` individual `S` ATOMS, and `15xxN_A` individual `O` atoms. Are you with me?

We can use this number to specify the mass of the sulfur dioxide, because each of those individual particles has a definite and measurable mass, and this mass appears on the Periodic Table. Thus `1` `mol` `SO_2` has a mass of `32.06*g+2xx15.999*g`, approx. `64` `g`.

Can you tell the number of representative particles in a molar quantity of `SO_3` gas? How many sulfur atoms? How many oxygen atoms.