Thanks in advance!
Balance the Equation: Ba (s) + "2" HOH (aq) >>>Ba(OH)2 (aq) + H2
this is the correct equation. A general way to balance equations is solving a set of equations:
a Ba + b H2
O --> c Ba(OH)2
+ d H2
Ba --> a = c
H --> 2b = 2c + 2d
O --> b = 2c
Now use substitution to get b = 2c
Now all variables are dependent on c thus we take c = 1 for the lowest coefficients. It automatically follows a = 1, b = 2, c = 1 and d = 1.