Concept explainers
(a)
Interpretation:
The number of moles of oxygen in
Concept introduction:
A mole of a substance is defined as the same number of particles of the substance as that present in
Answer to Problem 23E
The number of moles of oxygen in
Explanation of Solution
The given mass of oxygen is
The molar mass of the oxygen atom is
The molar mass of compound is the sum of molar mass of individual elements present in it.
Hence, the molar mass of
The number of moles of a substance is given as,
Where,
•
•
Substitute the value of mass and molar mass of oxygen in the equation (1).
Therefore, the number of moles of oxygen in
The number of moles of oxygen in
(b)
Interpretation:
The number of moles of magnesium nitrate in
Concept introduction:
A mole of a substance is defined as the same number of particles of the substance as present in
Answer to Problem 23E
The number of moles of magnesium nitrate in
Explanation of Solution
The given mass of magnesium nitrate is
The molar mass of the magnesium atom is
The molar mass of the nitrogen atom is
The molar mass of the oxygen atom is
The molar mass of compound is the sum of molar mass of individual elements present in it.
Hence, the molar mass of
The number of moles of a substance is given as,
Where,
•
•
Substitute the value of mass and molar mass of magnesium nitrate in the equation (1).
Therefore, the number of moles of magnesium nitrate in
The number of moles of magnesium nitrate in
(c)
Interpretation:
The number of moles of aluminum oxide in
Concept introduction:
A mole of a substance is defined as the same number of particles of the substance as present in
Answer to Problem 23E
The number of moles of aluminum oxide in
Explanation of Solution
The given mass of aluminum oxide is
The molar mass of the aluminum atom is
The molar mass of the oxygen atom is
The molar mass of compound is the sum of molar mass of individual elements present in it.
Hence, the molar mass of
The number of moles of a substance is given as,
Where,
•
•
Substitute the value of mass and molar mass of aluminum oxide in the equation (1).
Therefore, the number of moles of aluminum oxide in
The number of moles of aluminum oxide in
(d)
Interpretation:
The number of moles of
Concept introduction:
A mole of a substance is defined as the same number of particles of the substance as present in
Answer to Problem 23E
The number of moles of
Explanation of Solution
The given mass of
The molar mass of the carbon atom is
The molar mass of the hydrogen atom is
The molar mass of the oxygen atom is
The molar mass of compound is the sum of molar mass of individual elements present in it.
Hence, the molar mass of
The number of moles of a substance is given as,
Where,
•
•
Substitute the value of mass and molar mass of
Therefore, the number of moles of
The number of moles of
(e)
Interpretation:
The number of moles of ammonium carbonate in
Concept introduction:
A mole of a substance is defined as the same number of particles of the substance as present in
Answer to Problem 23E
The number of moles of ammonium carbonate in
Explanation of Solution
The given mass of ammonium carbonate is
The molar mass of the carbon atom is
The molar mass of the hydrogen atom is
The molar mass of the nitrogen atom is
The molar mass of the oxygen atom is
The molar mass of compound is the sum of molar mass of individual elements present in it.
Hence, the molar mass of
The number of moles of a substance is given as,
Where,
•
•
Substitute the value of mass and molar mass of ammonium carbonate in the equation (1).
Therefore, the number of moles of ammonium carbonate in
The number of moles of ammonium carbonate in
(f)
Interpretation:
The number of moles of lithium sulfide in
Concept introduction:
A mole of a substance is defined as the same number of particles of the substance as present in
Answer to Problem 23E
The number of moles of lithium sulfide in
Explanation of Solution
The given mass of lithium sulfide is
The molar mass of the sulfur atom is
The molar mass of the lithium atom is
The molar mass of compound is the sum of molar mass of individual elements present in it.
Hence, the molar mass of
The number of moles of a substance is given as,
Where,
•
•
Substitute the value of mass and molar mass of lithium sulfide in the equation (1).
Therefore, the number of moles of lithium sulfide in
The number of moles of lithium sulfide in
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Chapter 7 Solutions
Bundle: Introductory Chemistry: An Active Learning Approach, 6th + Owlv2, 4 Terms (24 Months) Printed Access Card
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- Questions 27 to 30: Calculate the mass of each substance from the number of moles given. a 0.769mol lithium chloride b 57.1mol acetic acid, HC2H3O2 c 0.68mol lithium d 0.532mol iron (III) sulfate e 8.26mol sodium acetate acetate ion, C2H3O2arrow_forwardHow many N atoms are present in 1.11 · 10-2 mol of LiNO3 formula units? Express your answer in scientific notation.arrow_forwardDetermine the number of atoms in 71.0g of Br. (Molar mass of one mole of Br is 79.90)arrow_forward
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