Question

Na+H2O=NaOH+H2 ............................

Answer 1

2Na + 2H2O = 2NaOH + H2↑ 
                      гидроксид  водород
                      натрия

Answer 2

The chemical equation you provided is: Na + H2O = NaOH + H2.

This equation represents the reaction between sodium (Na) and water (H2O) to produce sodium hydroxide (NaOH) and hydrogen gas (H2).

Here is the balanced equation for this reaction:

2 Na + 2 H2O = 2 NaOH + H2

In this reaction, two sodium atoms react with two water molecules to produce two molecules of sodium hydroxide and one molecule of hydrogen gas.

Please note that the equation you provided is not balanced. The balanced equation accounts for the conservation of atoms on both sides of the equation.