How many moles of BaF are there in 41 grams of BaF?

1 Answer
Mar 5, 2016

Do you mean barium fluoride, BaF_2. I presume you do, because there ain't no such beast as BaF. There are approx. 0.25 mol BaF_2.

Explanation:

"Formula mass," BaF_2 = 175.34*g*mol^-1. To get the number of moles, simply divide the mass by the molar mass:

(41.0*cancelg)/(175.34*cancelg*mol^-1) = ?? mol.

Note that we set this up dimensionally, and automatically got the units of mol, which might persuade us that we got it right (for once!).

How many moles of fluoride ion are in this quantity?