Question

For a given substance, what information links mass to moles? number of particles to moles?

Answer 1

Molar mass links mass to moles.............

Explanation:

And number of moles is equivalent to number of particles.

One mole of substance specifies `6.022xx10^23` particles.

Thus `1*mol` of say, `CO_2(g)`, represents `6.022xx10^23` carbon atoms, and `2xx6.022xx10^23` oxygen atoms. Since I know from the Periodic Table, that `6.022xx10^23` carbon atoms have a mass of `12*g`, and that `6.022xx10^23` oxygen atoms have a mass of `16*g`, it follows that 1 mole of `CO_2` has a mass of `44*g`. Do you follow this?