
Concept explainers
(a)
Interpretation:
The number of moles present in
Concept introduction:
The number of moles is calculated by the formula:
The formula to calculate mass is as follows:
(a)

Answer to Problem 3.124P
The number of moles present in
Explanation of Solution
The chemical formula for ammonium bromide is
Substitute
In
(b)
Interpretation:
The number of potassium ions in
Concept introduction:
The number of moles is calculated by the formula :
The formula to calculate mass from moles is as follows:
(b)

Answer to Problem 3.124P
The number of potassium ions in
Explanation of Solution
The chemical formula for potassium nitrate is
Substitute
The formula to evaluate the number of ions is as follows:
Substitute
In
(c)
Interpretation:
The mass of
Concept introduction:
The formula to calculate the moles is as follows:
The formula to calculate mass from moles is as follows:
(c)

Answer to Problem 3.124P
The mass of
Explanation of Solution
The molar mass of glycerol
Substitute
The mass of
(d)
Interpretation:
The volume of
Concept introduction:
The number of moles is calculated by the formula:
The relation between density, mass and volume is as follows:
(d)

Answer to Problem 3.124P
The volume of
Explanation of Solution
The chemical formula for chloroform is
Substitute
The density of chloroform is
Rearrange equation (2) for volume as follows:
Substitute
Hence the volume of
(e)
Interpretation:
The number of sodium ions present in
Concept introduction:
The number of moles is calculated by the formula:
(e)

Answer to Problem 3.124P
The number of sodium ions present in
Explanation of Solution
One mole of
The formula to evaluate the number of ions is as follows:
Substitute
The number of sodium ions present in
(f)
Interpretation:
The
Concept introduction:
The symbol and molar mass of cadmium is
The number of moles is calculated by the formula:
The formula to evaluate the number of atoms is as follows:
The conversion factor for converting
(f)

Answer to Problem 3.124P
The number of atoms in
Explanation of Solution
Since
Substitute
In order to calculate the number of atoms from the number of moles substitute
The number of atoms in
(g)
Interpretation:
The number of atoms in
Concept introduction:
The number of moles is calculated by the formula:
(g)

Answer to Problem 3.124P
The number of atoms in
Explanation of Solution
The chemical formula of fluorine gas is
Therefore, the number of fluorine atoms in
In order to calculate the number of atoms from the number of moles substitute
The number of fluorine atoms present in
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Chapter 3 Solutions
Chemistry: The Molecular Nature of Matter and Change
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