
Concept explainers
Interpretation:
The amount of magnesium nitride and magnesium oxide formed from the given condition has to be calculated.
Concept Introduction:
- Balanced chemical equation of a reaction is written according to law of conservation of mass.
- Equation for Number of moles of a substance, from its given mass is,
- Equation for Number of grams of a substance from its number of moles is,
- Mole ratio between the reactant and a product of a reaction are depends upon the coefficients of reactant and product in a balanced chemical equation.

Answer to Problem 3.161QP
The mass of magnesium nitride is
The mass of magnesium oxide is
Explanation of Solution
To determine: the balanced chemical equations for the given
In given reaction, Magnesium nitride reacts with Water to form magnesium hydroxide and ammonia.
Therefore,
The chemical equation for this reaction is,
Balanced chemical equation of a reaction is written according to law of conservation of mass.
Therefore,
The total number of each atoms in the reactant side should equal to the total number of each atoms in the product side.
So, in order to balance a chemical equation, the coefficients of compounds or atoms are needed to be changed in such a way that total number of each atoms in the reactant side and the total number of each atoms in the product side is to become equal.
Hence,
The balanced equations for the given reactions are,
To determine: the mass of
The mass of
The mass of
The mass of ammonia produced is given as 2.813g.
Equation for Number of moles of a substance, from its given mass is,
Therefore,
The number of moles of ammonia produced in the reaction is,
The balanced chemical equation of the reaction is,
The mole ratio between
So, the
Equation for Number of grams of a substance from its number of moles is,
Then,
The mass of
Hence,
The mass of
is
To determine: the mass of
The mass of
The number of moles of
There are three Mg elements in
So, the number of moles of
Equation for Number of grams of a substance from its number of moles is,
Then,
The mass of
The total mass of Mg presented in
So,
The mass of
To determine: the mass of
The mass of
The mass of
Equation for Number of moles of a substance, from its given mass is,
So, the number of moles of
There is only one Mg elements in
So, the number of moles of
Equation for Number of grams of a substance from its number of moles is,
Then,
The mass of
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Chapter 3 Solutions
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