How many moles of xenon do #5.66 xx 10^23# atoms equal?
A bit more than
And so we take the quotient:
This is dimensionally consistent, because
One mole of anything, including xenon atoms is
This gives us an equality from which we can derive two conversion factors.
Now we can write two conversion factors.
Now mutliply the given number of atoms by the conversion factor that has moles in the numerator. This will result in the Xe atoms canceling.