Answer:
190 grams
Explanation:
Find the molar mass of NaF
Na = 23.0
F = 19.0
23 + 19 = 42
Now use this dimensional analysis to show your work
4.5 mol NaF * ( 42.0 grams of NaF / 1 mol NaF)
Moles cancel out.
4.5 x 42.0 = 189
With sig figs, it is 190.
So the final answer is 190 grams in 4.5 moles NaF
