Concept explainers
(a)
Interpretation:
The molar mass of nitric acid (
Concept introduction:
The number of moles of a compound is defined as the ratio of the given mass of the compound to the molar or molecular mass of the compound.
The mathematical expression is given by:
Number of moles =
The one mole of any substance is equal to the
Answer to Problem 131A
Molar mass of
Explanation of Solution
The given compound is nitric acid having molecular formula
The molar mass of the compound is equal to the sum of
To find the molar mass of the compound, multiply the molecular weight of the atom by the corresponding subscript number.
Molar mass of nitrogen = 14.0067 g/mole
Molar mass of hydrogen = 1.00784 g/mole
Molar mass of oxygen = 15.999 g/mole
Molar mass of
=
=
(b)
Interpretation:
The molar mass of ammonium nitrate (
Concept introduction:
The number of moles of a compound is defined as the ratio of the given mass of the compound to the molar or molecular mass of the compound.
The mathematical expression is given by:
Number of moles =
The one mole of any substance is equal to the Avogadro number, i.e.,
Answer to Problem 131A
Molar mass of
Explanation of Solution
The given compound is ammonium nitrate having molecular formula
The molar mass of the compound is equal to the sum of atomic masses of all atoms present in the compound in gram/mole.
To find the molar mass of the compound, multiply the molecular weight of the atom by the corresponding subscript number.
Molar mass of nitrogen = 14.0067 g/mole
Molar mass of hydrogen = 1.00784 g/mole
Molar mass of oxygen = 15.999 g/mole
Molar mass of
=
=
(c)
Interpretation:
The molar mass of zinc oxide (
Concept introduction:
The number of moles of a compound is defined as the ratio of the given mass of the compound to the molar or molecular mass of the compound.
The mathematical expression is given by:
Number of moles =
The one mole of any substance is equal to the Avogadro number, i.e.,
Answer to Problem 131A
Molar mass of
Explanation of Solution
The given compound is zinc oxide having molecular formula
The molar mass of the compound is equal to the sum of atomic masses of all atoms present in the compound in gram/mole.
To find the molar mass of the compound, multiply the molecular weight of the atom by the corresponding subscript number.
Molar mass of zinc = 65.38 g/mole
Molar mass of oxygen = 15.999 g/mole
Molar mass of
=
=
(d)
Interpretation:
The molar mass of cobalt chloride (
Concept introduction:
The number of moles of a compound is defined as the ratio of the given mass of the compound to the molar or molecular mass of the compound.
The mathematical expression is given by:
Number of moles =
The one mole of any substance is equal to the Avogadro number, i.e.,
Answer to Problem 131A
Molar mass of
Explanation of Solution
The given compound is cobalt chloride having molecular formula
The molar mass of the compound is equal to the sum of atomic masses of all atoms present in the compound in gram/mole.
To find the molar mass of the compound, multiply the molecular weight of the atom by the corresponding subscript number.
Molar mass of cobalt = 58.93 g/mole
Molar mass of chlorine = 35.45 g/mole
Molar mass of
=
=
Chapter 10 Solutions
Glencoe Chemistry: Matter and Change, Student Edition
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