Concept explainers
Interpretation:
The number of sodium ions present in 25.0 g of sodium chloride should be calculated.
Concept introduction:
Number of moles of a compound is defined as the ratio of 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 149A
Number of sodium ions =
Explanation of Solution
The given compound is sodium chloride.
Molecular formula of sodium chloride =
Molar mass of
=
Mass of
Number of moles of
=
Or,
Number of moles of
=
Number of sodium ions =
=
=
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