Question

A magnesium ribbon is burnt in oxygen to give a white compound X accompanied by emissions of light. If the burning ribbon is now placed in an atmosphere of nitrogen, it continues to burn and form a compound Y. a)Write the chemical formulae of X and Y.  b) Write a balanced chemical equation,when X is dissolved in water.​

Answer 1

Answer:

1) mgo

2mg+0²=2mgo

when mgo dissolved in water then form

mg(oh)²

Answer 2

Explanation:

Given -

• A magnesium ribbon is burnt in oxygen to give a white compound X
• If the burning is now placed in an atmosphere of nitrogen, it continues to burn and form a compound Y

To Find -

• Write the chemical formula of X and Y
• Write a balanced chemical equation, when X is dissolved in water

As we know that :-

• When magnesium burns in air, it combines with the oxygen of air and form magnesium oxide.

Mg + O2 → X

It means,

• 2Mg + O2 → 2MgO

Now,

• If the burning is now placed in an atmosphere of nitrogen, it continues to burn and form a compound Y

It means,

Mg + N2 → Y

It means,

• 3Mg + N2 → Mg3N2

And

When X dissolved in water it forms

X + H2O → Z

It means,

• MgO + H2O → Mg(OH)2

Hence,

X is MgO

Y is Mg3N2

Z is Mg(OH)2