Question

Ba(OH)2 +? = BaZnO2​

Answer 1

Ba(OH)2 + Zn(OH)2 = BaZnO2+ 2H2O

Answer 2

The balanced chemical equation for the reaction you're describing, where Barium hydroxide (Ba(OH)2) reacts with something to form Barium zincate (BaZnO2), would look like this:

2 Ba(OH)2 + ZnO → BaZnO2 + 2 H2O

In this equation, two moles of Barium hydroxide react with one mole of Zinc oxide to produce one mole of Barium zincate and two moles of water. Keep in mind that chemical reactions can vary based on reaction conditions and the specific reactants involved.