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To determine the nickel content in a brass alloy the brass sample (4.9204 g) was dissolved...

To determine the nickel content in a brass alloy the brass sample (4.9204 g) was dissolved in 25 mL of concentrated nitric acid and diluted to 250 mL. The addition of dimethylglyoxime to 50 mL of the solution gives rise to a bright pink precipitate according to the following reaction: Ni2+ + 2 H2C4H6O2N2 → 2 H+ + Ni(HC4H6O2N2)2 (s) ​​ Dimethylglyoxime If 149.3 mg of precipitate was collected at the end of the experiment, what percent of the brass sample is nickel?

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