What is the mass of 4.80 mol of barium hydride, BaH2? A. 4.80 g
B. 29.0 g
C. 139 g
D. 669 g

mole=wt/M.wt

M.wBaH2→139.34g/mol

4.80=wt/139.34

wt=4.80×139.34

wt=668.8

wt≈669✓

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.