This question is asking for the number of particles that one formula unit of magnesium bromide will produce when dissolved in solution. At the end, the result turns out to be three (3) particles as shown below:
In chemistry, we understand ionization as a process whereby ionic substances split into ions as they dissolve in water. In this case, for magnesium bromide, MgBr₂, we see one Mg²⁺ and two Br⁻ ions are produced as shown below:
[tex]MgBr_2\rightarrow Mg^{2+}+2Br^-[/tex]
Which means we will have three (3) particles when one formula unit of this salt dissolves.
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