what is the balanced equation for synthesis Magnesium and water???

Answer 1

Mg (S) + H2O (G) ------> MgO (S) + H2 (g)

Mg will react with steam only and both Magnesium and Hydrogen will burn in contact with air.

Answer 2

Magnesium metal and alloys are highly flammable in their pure form when molten, as a powder, or in ribbon form. Burning or molten magnesium metal reacts violently with water. Magnesium powder is an explosive hazard. One should wear safety glasses while working with magnesium. The bright white light (including ultraviolet) produced by burning magnesium can damage the eyes. Water should not be used to extinguish magnesium fires, because it can actually feed the fire, according to the reaction:[2]

Mg (s) + 2 H2O (g) → Mg(OH)2 (aq) + H2 (g)
or in words:

Magnesium (solid) + steam → Magnesium hydroxide (aqueous) + Hydrogen (gas)

Carbon dioxide fire extinguishers should not be used either, because magnesium can burn in carbon dioxide (forming magnesium oxide, MgO, and carbon).[3] A Class D dry chemical fire extinguisher should be used if available, or else the fire should be covered with sand or magnesium foundry flux. An easy way to put out small metal fires is to place a polyethene bag filled with dry sand on top of the fire. The heat of the fire will melt the bag and the sand will flow out onto the fire.

Answer 3

at common condition, Mg + H2O => Mg(OH)2 + H2 : just a little of Mg reacts
at high temperature Mg + H2O => MgO + H2

Answer 4

That is Mg + H2O + Q = MgO + H2 (gas)

Q stands for heat.