Concept explainers
(a)
Interpretation:
The given reaction
Concept Introduction:
Balancing the equation:
- There is a Law for conversion of mass in a
chemical reaction i.e., the mass of total amount of the product should be equal to the total mass of the reactants. - First write the skeletal reaction from the given information.
- Then count the number of atoms of each element in reactants as well as products.
- Place suitable coefficients in front of reactants as well as products until the number of atoms on each side (reactants and products) becomes equal.
(a)

Explanation of Solution
Given equation:
Balancing the chemical Equation:
Count the number of atoms on each side of the reaction.
Atom | Reactant side | Product side |
2 | 1 | |
2 | 3 |
Place suitable coefficient before reactants and products and then check for the number of atoms again.
Atom | Reactant side | Product side |
2 | 2 | |
6 | 6 |
The number of atoms of present on each side of the reaction is same. Hence, the balanced equation for the given reaction is
(b)
Interpretation:
For the given reaction, the number of
(b)

Explanation of Solution
Given reaction:
From subpart (a), the balanced equation of the given reaction is
From the stoichiometry of the balanced equation, three moles of
(c)
Interpretation:
For the given reaction, the number of moles of product that would form from
(c)

Explanation of Solution
Given reaction:
From subpart (a), the balanced equation of the given reaction is
From the stoichiometry of the balanced equation, one mole of
(d)
Interpretation:
The number of moles of
Concept Introduction:
Moles:
Mole of the substance is found by dividing the mass of the substance by its molar mass.
(d)

Explanation of Solution
Given reaction:
From subpart (a), the balanced equation of the given reaction is
Determination of moles:
From the balanced equation, it is known that one mole of
The molar mass of
Determine the moles of
One mole of
Thus, the number of moles of
(e)
Interpretation:
The amount (in
Concept Introduction:
Mass:
Mass of the compound is calculated by mole of the compound multiplied with molar mass of the compound.
(e)

Explanation of Solution
Given reaction:
From subpart (a), the balanced equation of the given reaction is
Determination of mass of product:
From the balanced equation, it is known that one mole of
The molar mass of
Determine the moles of
One mole of
Thus, the number of moles of
The molar mass of
Now, calculate the mass of
Therefore, the mass of
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Chapter 4 Solutions
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