When the following reaction reaches equilibrium the concentration for calcium is 0.0020 M and the concentration for hydroxide is 0.0040 M. Calculate the equilibrium constant, Keq.
Ca(OH)2(s) Ca2+(aq) + 2OH-(aq)

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Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

Identify the lewis acid in this balanced equation: ag+ + 2nh3 -> ag(nh3)2+a. ag+b. nh3c. ag(nh3)2+