Respuesta :
Moles are the measure of the small entities. There are 7 moles of Cr in the sample.
What is dissociation?
Dissociation is the splitting of the larger compound into its simpler and smaller constituents. The dissociation of the compound will be:
Cr₇(PO₄)₃ ⇆ 7Cr³⁺ + 3PO⁴⁻
From the dissociation, it can be said that 1 mole of chromium phosphate dissociates into 7 moles of chromium ions.
Given, that the moles of the compound, chromium phosphate is 1 mole.
Then moles of chromium ion will be: 1 × 7 = 7 moles
Therefore, 7 moles of chromium ions are present in the sample.
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