magnesium hydroxide + hydrobromic acid -->

is the formula for that

Mg(OH)2(s) + HBr(aq) ->H2O(l) +BrOH(s)

and are the physical states correct??

2 answers

Mg(OH)2(s) + HBr(aq) ==> 2H2O(l) + MgBr2(aq)
This is a typical acid/base reaction in which the products are a salt (MgBr2) + water(H2O).
This is not balanced