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(1) Ca(s) + 2H2O(l) = Ca(OH)2 (aq) + H2 (g)
(2) 3Fe(s) + 4H2O(g) = Fe3O4(s) + 4H2 (g)
(3) 2ZnS(s) + 3O2 (g) = 2ZnO(s) + 2SO2 (g)
(4). magnesium reacts with the oxygen in the air to form a white precipitate called magnesium oxide (mgo)
mg +o= mgo
(5) When sodium metal reacts with water to give sodium hydroxide and hydrogen gas:
2Na + 2H2O → 2NaOH + H2
(6). Aluminium and steam
2Al + 3H2O → Al2O3 + 3H2
(2) 3Fe(s) + 4H2O(g) = Fe3O4(s) + 4H2 (g)
(3) 2ZnS(s) + 3O2 (g) = 2ZnO(s) + 2SO2 (g)
(4). magnesium reacts with the oxygen in the air to form a white precipitate called magnesium oxide (mgo)
mg +o= mgo
(5) When sodium metal reacts with water to give sodium hydroxide and hydrogen gas:
2Na + 2H2O → 2NaOH + H2
(6). Aluminium and steam
2Al + 3H2O → Al2O3 + 3H2
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