Answer
a) Barium fluoride, Silicon tetrachloride, Nickel (II) bromide
b) $BaF_2$, $NiBr_2$ are ionic.
$SiCl_4$ is molecular.
c) 1.0 mol of $NiBr_2$
Work Step by Step
a,b) Ionic: $Ba^{2+}$ - Barium, $F^-$ - Fluoride: Barium fluoride,
Molecular: Silicon tetrachloride,
Ionic: $Ni^{2+}$ - Nickel(II), $Br^{-}$ Bromide: Nickel (II) bromide
c) Molar masses (g/mol): $BaF_2: 175.32,\ SiCl_4:169.90,\ NiBr_2:218.50$.
$NiBr_2$ has the largest molar mass and has more amount of moles in the sample, so it's the one with the largest mass.
