What would be the change in pressure in a sealed 10.0 L vessel due to the formation of N2 gas when the ammonium nitrite in 2.20 L of 1.20 M NH4NO2decomposes at 25.0°C? (in atm)

Consider the decomposition of ammonium nitrite: NH4NO2 yields to N2 + H2O. What would be the change in pressure in a sealed 10.0 L vessel due to the formation of N2 gas when the ammonium nitrite in 2.90 L of 0.990 M NH4NO2 decomposes at 25 degrees celcius? Use PV=nRT

What would be the change in pressure in a sealed 10.0 L vessel due to the formation of N2 gas when the ammonium nitrite in 1.9 L of 1.250 M NH4NO2 decomposes at 25 degrees C? NH4NO2 --> N2 + 2 H2O