The molecular weight of LiF is 26:
Atomic mass of Li + Atomic mass of F
= 7 + 19
= 26
We can also say that one mole of LiF is equal to 26 grams.
Now, if 26 grams equal 1 mole, how many moles do 39 grams contain? Let's see:
z = (39x1)/26
z = 1.5 moles
So, your answer would be that 1.5 moles of LiF would be equivalent to 39 grams.
Atomic mass of Li + Atomic mass of F
= 7 + 19
= 26
We can also say that one mole of LiF is equal to 26 grams.
Now, if 26 grams equal 1 mole, how many moles do 39 grams contain? Let's see:
z = (39x1)/26
z = 1.5 moles
So, your answer would be that 1.5 moles of LiF would be equivalent to 39 grams.
