
Concept explainers
(a)
Interpretation:
The number of formula units in
Concept introduction:
A mole is a basic unit that is used in the International system of units (SI). It is abbreviated as

Answer to Problem 31E
The number of formula units in
Explanation of Solution
The molecular formula for lithium nitrate is
The molar mass of nitrogen is
The molar mass of oxygen is
The molar mass of lithium is
The molar mass of
Therefore, the molar mass of
Thus, one mole of
The number of moles in
The number of formula units in
Substitute the number of moles of
The number of formula units in
(b)
Interpretation:
The number of formula units in
Concept introduction:
A mole is a basic unit that is used in the International system of units (SI). It is abbreviated as

Answer to Problem 31E
The number of formula units in
Explanation of Solution
The molecular formula for lithium sulfide is
The molar mass of lithium is
The molar mass of sulfur is
The molar mass of
Therefore, the molar mass of
Thus one mole of
The number of moles in
The number of formula units in
Substitute the number of moles of
The number of formula units in
(c)
Interpretation:
The number of formula units in
Concept introduction:
A mole is a basic unit that is used in the International system of units (SI). It is abbreviated as

Answer to Problem 31E
The number of formula units in
Explanation of Solution
The molecular formula for iron
The molar mass of iron is
The molar mass of sulfur is
The molar mass of oxygen is
The molar mass of
Therefore, the molar mass of
Thus one mole of
The number of moles in
The number of formula units in
Substitute the number of moles of
The number of formula units in
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