e states of reactants and products must be shown Combination

e. (states of reactants and products must be shown) Combination: Formation of a Metal Oxide . Description, Mg ribon Shiny thin, small sha meel 2. Description of reaction h Description of final product umed into white ash 3. 4. Molecular equation for the reaction of magnesium with air in the presence of heat (states of reactants and products must be shown) Chemistry 131 University of South Alabama

Solution

1 to 3 you have written are correct.

4.

Molecular equation:

(a)

2 Mg (s) + O₂ (g) -----Heat-------> 2 MgO (s)

So,

Magnesium on reaction with oxygen in the air forms magnesium oxide, a white ash.

(b)

Magnesium on reaction with nitrogen of air to form magneisum nitride.

3 Mg (s) + N₂ (g) ----Heat--------> Mg₃N₂ (s)