Question

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PLEASE HELP!!

chemically balance the following:


____ Mg(OH)2 + __ HCl → ____ MgCl2 + __ H2O


____ CH4 + ____ O2 → _____ CO2 + ____ H2O


___ Cu + ___ Br2 → ___ CuBr2

Answer 1

first one - Mg(OH)2+2HCl— MgCl2+ 2H2O
second one - CH4+2O2– 2H20
Third- is already balanced.