Concept explainers
Interpretation:
The mass of iron(III) chloride contains
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 143A
Mass of iron(III) chloride contains
Explanation of Solution
The given compound is iron(III) chloride.
Molecular formula =
Number of chloride ions =
The molar mass of
=
Since one mole of any substance is equal to the Avogadro number, i.e.,
Thus, the mass of
= 21.1 g
Mass of iron(III) chloride contains
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