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A sample weighing 2.40g contains an unknown amount of nickel (II) nitrate. The sample was heated...

A sample weighing 2.40g contains an unknown amount of nickel (II) nitrate. The sample was heated and the following reaction occurred: 2Ni (NO3) 2 (s)  2NiO (s) + 4NO2 (g) + O2 (g) What is the percentage of nickel (II) nitrate in the sample if 265ml of gas was formed at 160oC and 1.0 atmosphere pressure? The rest of the substance in the sample does not emit gas upon heating. (Hint: Use Table and Formula Collection).

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