The following reactions are carried out :
A : Nitrogen + metal → compound X.
B : X +water → ammonia +another compound.
C : Ammonia + metal oxide → metal+ water +N2.
One metal that can be used for reaction A is magnesium.
(a) Write the formula of the compound X formed.
(b) Write the correctly balanced equation for reaction B where X is the compound formed.
(c) What property of ammonia is demonstrated by reaction C ?