Respuesta :

The correct answer is: Q = [tex]5.0 * 10^{-6}[/tex]

Explanation:

The chemical equation is:
[tex]MgCO_3 \to Mg^{2+} + CO_3^{2-}[/tex]

The value of Q can be obtained as follows:

Q = [[tex]Mg^{2+}[/tex]][[tex]CO_3^{2-}[/tex]]
Q = [2.50×x10^−3][2.00×10^−3]
Q = 
[tex]5.0 * 10^{-6}[/tex]