Cr(OH)3 = Cr3 O3 + H2O

Answer 1

Did you mean
Cr(OH)3 = Cr2O3 + H2O ?
If so, then balance the Cr to get
2Cr(OH)3 = Cr2O3 + H2O
Now you have 6H and 6O on the left, so try
2Cr(OH)3 = Cr2O3 + 3H2O