Answer: 13.47g of MgBr2
Explanation:
MM of MgBr2 = 24 + (2 x 80) = 24 + 160 = 184g/mol
Mass conc. Of MgBr2 = 0.183 x184 = 33.672g
33.672g of MgBr2 dissolves in 1000mL
Therefore Xg of MgBr2 will dissolve in 400mL
Xg of MgBr2 = ( 33.672 x 400)/1000
Xg of MgBr2 = 13.47g
