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Question

Estimate the value (x) to balance the given equation.

Mg3N2(aq) + xH2O(l)3mg(OH)2(aq) + 2NH3(g)

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Solution

A balanced chemical equation has an equal number of atoms on both sides of a chemical reaction.

For the given equation :Mg3N2(aq) + xH2O(l)3Mg(OH)2(aq) + 2NH3(g)

Reactants

Products

Elements

No. of atoms

Elements

No. of atoms

Mg

3

Mg

3

N

2

N

2

H

2

H

12

O

1

O

6


Here, Mg and N atoms are balanced on both sides.To balance H and O atoms, the value of (x) should be 6.

Hence, the balanced equation is:
Mg3N2(aq) + 6H2O(l)3Mg(OH)2(aq) + 2NH3(g)

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