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Please answer both questions. One millimole of Ni(NO3)2 dissolves in 270.0 mL of a solution that...

Please answer both questions.

One millimole of Ni(NO3)2 dissolves in 270.0 mL of a solution that is 0.400 M in ammonia.
The formation constant of Ni(NH3)62+ is 5.5×108.

What is the initial concentration of Ni(NO3)2 in the solution?

What is the equilibrium concentration of Ni2+(aq ) in the solution?

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