Question

How many moles are in `4.5 xx 10^24` molecules of sodium fluoride, NaF?

Answer 1

7.5 moles

Explanation:

You compare this amount to 1 mole of substance.

1 mole of substance (NaF) has `6.022 xx 10^23` molecules.

No. of moles `=( 4.5xx10^(24)cancel"molecules")/(6.022xx10^23 cancel("molecules")/"mol")=7.5 "moles"`

Note: Technically NaF is an ionic compound, not a molecular compound.