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Concept explainers
(a)
Interpretation:
Empirical formula of compound that has lithium and oxygen has to be determined.
Concept Introduction:
Mole is S.I. unit. The number of moles is calculated as ratio of mass of compound to molar mass of compound.
Molar mass is sum of the total mass in grams of all atoms that make up mole of particular molecule that is mass of 1 mole of compound. The S.I unit is
The expression to relate number of moles, mass and molar mass of compound is as follows:
Empirical formula is simplest positive integer ratio of atoms in the compound. It only gives proportions of elements in compound.
(a)
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Answer to Problem 11.15P
Empirical formula of compound is
Explanation of Solution
Mass % of
Mass of
Molar mass of
The formula to calculate number of moles of
Substitute
Mass of
Molar mass of
The formula to calculate number of moles of
Substitute
Preliminary formula for compound is formed with moles of
Each of subscript of
(b)
Interpretation:
Empirical formula of compound that has
Concept Introduction:
Refer to part (a).
(b)
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Answer to Problem 11.15P
Empirical formula of compound is
Explanation of Solution
Mass % of
Mass of
Molar mass of
The formula to calculate number of moles of
Substitute
Mass of
Molar mass of
The formula to calculate number of moles of
Substitute
Preliminary formula of compound is formed with moles of
Each of subscript of
(c)
Interpretation:
Empirical formula of compound that has
Concept Introduction:
Refer to part (a).
(c)
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Answer to Problem 11.15P
Empirical formula of compound is
Explanation of Solution
Mass % of
Mass of
Molar mass of
The formula to calculate number of moles of
Substitute
Mass of
Molar mass of
The formula to calculate number of moles of
Substitute
Preliminary formula for compound is formed with moles of
Each of subscript of
(d)
Interpretation:
Empirical formula of compound that has calcium and chloride has to be determined.
Concept Introduction:
Refer to part (a).
(d)

Answer to Problem 11.15P
Empirical formula of compound is
Explanation of Solution
Mass % of
Mass of
Molar mass of
The formula to calculate number of moles of
Substitute
Mass of
Molar mass of
The formula to calculate number of moles of
Substitute
Preliminary formula for compound is formed with moles of
Each of subscript of
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Chapter 11 Solutions
General Chemistry
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