
Concept explainers
(a)
Interpretation:
The mass percent of chlorine in
Concept Introduction:
Molar mass: It is obtained by dividing the mass of substance with the amount of substance and the S.I. unit of molar mass is
Molar mass of
Mass ratio of a compound with formula AB can be determined as follows,
Mass percentage will give an idea about how many parts exist in every 100 parts of the whole substance.
Mass percentage of a compound with formula AB can be determined as follows,
(a)

Explanation of Solution
Given molecule is
Molar mass of chlorine is 35.5 g/mol and there are three chlorine atoms in the given Freon-11 molecule.
The mass percent of chlorine in
(b)
Interpretation:
Interpretation:
The mass percent of chlorine in
Concept Introduction:
Molar mass: It is obtained by dividing the mass of substance with the amount of substance and the S.I. unit of molar mass is
Molar mass of
Mass ratio of a compound with formula AB can be determined as follows,
Mass percentage will give an idea about how many parts exist in every 100 parts of the whole substance.
Mass percentage of a compound with formula AB can be determined as follows,
(b)

Explanation of Solution
Given molecule is
Molar mass of chlorine is 35.5 g/mol and there are three chlorine atoms in the given Freon-12 molecule.
The mass percent of chlorine in
(c)
Interpretation:
The maximum mass of chlorine that could be released in the stratosphere by 100 g of Freon-11 and Freon -12 has to be calculated.
Concept Introduction:
Molar mass: It is obtained by dividing the mass of substance with the amount of substance and the S.I. unit of molar mass is
Molar mass of
Mass ratio of a compound with formula AB can be determined as follows,
Mass percentage will give an idea about how many parts exist in every 100 parts of the whole substance.
Mass percentage of a compound with formula AB can be determined as follows,
(c)

Explanation of Solution
The mass percentage of chlorine in Freon-11 and Freon -12 are
And so, the maximum mass of chorine that could be released in the stratospher by 100 g of each compound will be 77.5 g and 58.7 g respectively.
(d)
Interpretation:
The number of atoms in 77.5 g and 58.7 g of chlorine has to be determined.
Concept Introduction:
Molar mass: It is obtained by dividing the mass of substance with the amount of substance and the S.I. unit of molar mass is
The relation between the number of moles and mass of the substance is,
(d)

Explanation of Solution
The mass percentage of chlorine in Freon-11 and Freon -12 are
And so, the maximum mass of chorine that could be released in the stratospher by 100 g of each compound will be 77.5 g and 58.7 g respectively.
The number of chlorine atoms in these masses can be calculated as follows,
In Freon-11
In Freon-12
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Chapter 4 Solutions
Chemistry In Context
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