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Concept explainers
(a)
Interpretation:
The larger quantity between
Concept introduction:
The formula to calculate the number of moles is:
The formula to calculate mass is as follows:
(a)
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Answer to Problem 3.120P
Both the quantities have an equal number of entities.
Explanation of Solution
Since an equal number of moles of various substances contains an equal number of entities. Both
Ozone molecules present in
(b)
Interpretation:
The larger of the two given quantities in terms of grams is to be identified.
Concept introduction:
The formula to calculate the number of moles is:
The formula to calculate mass is as follows:
(b)
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Answer to Problem 3.120P
Explanation of Solution
The molar mass of O is
The molar mass of
Since
Substitute
Substitute
For the same number of moles, the quantity with larger molar mass will have a larger mass.
(c)
Interpretation:
Whether the number of moles will be larger in
Concept introduction:
The formula to calculate the number of moles is:
The formula to calculate mass is as follows:
(c)
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Answer to Problem 3.120P
In terms of moles
Explanation of Solution
The molar mass of
Substitute
Hence
The number of moles in
(d)
Interpretation:
Whether the mass of
Concept introduction:
The formula to calculate the number of moles is:
The formula to calculate mass is as follows:
(d)
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Answer to Problem 3.120P
In terms of mass in grams
Explanation of Solution
Substitute
Substitute
Hence
For the same number of moles, the quantity with larger molar mass will have a larger mass.
(e)
Interpretation:
Whether the number of ions in
Concept introduction:
The electrolyte is the substance that produces ions when it is dissolved in a polar solvent. It breaks into positively and negatively charged ions that spread uniformly through the solvent. The electrolytic solution, as a whole, is electrically neutral. Sodium chloride, potassium chloride, calcium phosphate are some of the examples of electrolytes.
Strong electrolytes are those electrolytes that completely dissociates into its ions. These have a very high value of electrical conductance. Sodium chloride and potassium chloride are strong electrolytes.
Weak electrolytes are those electrolytes that partially dissociates into its ions. They are poor conductors of electricity. Acetic acid and carbonic acid are weak electrolytes.
(e)
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Answer to Problem 3.120P
The number of ions is larger in
Explanation of Solution
The chemical formulas for sodium chlorate and magnesium chloride are
On dissociation
Hence total moles of ions present in
Total moles of ions present in
Hence
Magnesium chloride and sodium chlorate are strong electrolyte and give corresponding ions in the solution. Magnesium chloride gives more number of ions per mole compared to sodium chlorate.
(f)
Interpretation:
Whether the number of molecules in
Concept introduction:
The formula to calculate the number of molecules from the number of moles is as follows:
(f)
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Answer to Problem 3.120P
Explanation of Solution
Substitute
Substitute
Substitute
Substitute
Hence
Greater the number of molecules present in the given mass of the sample larger will be the number of molecules present.
(g)
Interpretation:
Whether the mass of
Concept introduction:
The formula to calculate the number of moles is:
The formula to calculate mass is as follows:
The formula to calculate the number of molecules is as follows:
(g)
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Answer to Problem 3.120P
Explanation of Solution
For an equal number of atoms of each isotope of uranium that is
Equation (2) implies that for an equal number of moles the one with greater molar mass or whichever isotope is heavier would have greater mass in grams.
Hence
For an equal number of particles
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Chapter 3 Solutions
CHEMISTRY >CUSTOM<
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