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Suppose a 500mL solution contains 2.00 millimoles of Co(NO3)2, 150.0 millimoles of NH3, and 150.0 milllimoles of Ethylendediamine (en). What is the concentration of Cobalt 2+ (aq) in the solution? (the Kf for formation of Co(NH3)6 2+ is 7.7x10^4. the Kf for the formation of Co(en)3 2+ is 8.7x10^13)

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