Concept explainers
Interpretation:
The number of particles of gold atoms present in the bracelet 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 98A
The number of particles of gold atoms present in the bracelet =
Explanation of Solution
A bracelet contains 75 % gold.
Given number of moles of metal atoms = 0.200 mole
Thus, number of moles of gold in 75 % gold
=
Since, one mole of any substance is equal to the Avogadro number i.e.
Thus, number of gold particles =
=
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Glencoe Chemistry: Matter and Change, Student Edition
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