Question

Magnesium ribbon is burnt in a jar contain nitrogen gas when a white powder of magnesium nitrate is obtained

Answer 1

Magnesium ribbon is burnt in a jar containing nitrogen gas, which gives a white powder of magnesium nitride.

we know,

symbol of magnesium = Mg

chemical formula of nitrogen gas = N2

chemical formula of magnesium nitride = Mg3N2

so, skeleton chemical reaction will be ...

see ,left side present only one magnesium atom while right side three magnesium atoms.

To balance chemical, just multiply 3 with magnesium.

e.g., This is balanced chemical equation.