Question (1 point) In some aquatic ecosystems,nitrate (NO3) is converted to nitr

Question

Question (1 point) In some aquatic ecosystems,nitrate (NO3) is converted to nitrite (NO2 ) which then decomposes to nitrogen and water. As an example of this second reaction, consider the decomposition of ammonium nitrite NH4NO2(aq)- N2(g) + 2H20(1) Q See page 293 1st attempt l See Periodic Table See Hint What would be the change in pressure in a sealed 100L vessel due to the formation of N2 gas when the ammonium nitrite in 3.00Lof 0.900 M NH4NO2 decomposes at 25.0°C? atm 08/14 > 3 OF 14 DOLL

Explanation / Answer

NH4NO2 (aq.) ------------> N2 (g) + 2 H2O (l)

From the given data,

Moles of NH4NO2 = Molarity * volume = 0.900 * 3.00 = 2.70 mol

From the balanced equation,

1 mol NH4NO2 forms 1 mol N2

then, 2.70 mol NH4NO2 forms 2.70 mol N2

Therefore,

moles of N2 = 2.70 mol

Volume = 10.0 L

T = 25 + 273.15 = 298.15 K

R = 0.0821 L.atm.K-1.mol-1

Assuming ideal behaviour,

P V = n R T

P = 2.70 * 0.0821 * 298.15 / 10.0

P = 6.61 atm

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