Chemistry Practice Problems Gas Stoichiometry Practice Problems Solution: The emission of NO2 by fossiI fuel combustion can ...

# Solution: The emission of NO2 by fossiI fuel combustion can be prevented by injecting gaseous urea into the combustion mixture. The urea reduces NO (which oxidizes in air to form NO2) according to the reaction: 2 CO(NH2)2(g) + 4 NO(g) + O2(g) → 4 N2(g) + 2 CO2(g) + 4 H2O(g) Suppose that the exhaust stream of an automobile has a flow rate of 2.55 L/s at 655 K and contains a partial pressure of NO of 12.4 torr. What total mass of urea is necessary to react completely with the NO formed during 8.0 hours of driving?

###### Problem

The emission of NO2 by fossiI fuel combustion can be prevented by injecting gaseous urea into the combustion mixture. The urea reduces NO (which oxidizes in air to form NO2) according to the reaction:

2 CO(NH2)2(g) + 4 NO(g) + O2(g) → 4 N2(g) + 2 CO2(g) + 4 H2O(g)

Suppose that the exhaust stream of an automobile has a flow rate of 2.55 L/s at 655 K and contains a partial pressure of NO of 12.4 torr. What total mass of urea is necessary to react completely with the NO formed during 8.0 hours of driving?

Gas Stoichiometry

Gas Stoichiometry

#### Q. Ammonium nitrate decomposes explosively upon heating according to the balanced equation:  2 NH4NO3(s) → 2 N2(g) + O2(g) + 4 H2O(g) Calculate the tot...

Solved • Fri Jun 03 2016 15:20:40 GMT-0400 (EDT)

Gas Stoichiometry

#### Q. Consider the reaction: 2 SO2(g) + O2(g) → 2 SO3(g) b. If 187.2 mL of SO3 is collected (measured at 315 K and 50.0 mmHg), what is the percent yield f...

Solved • Fri Jun 03 2016 15:14:01 GMT-0400 (EDT)

Gas Stoichiometry

#### Q. When hydrochloric acid is poured over potassium sulfide, 42.9 mL of hydrogen sulfide gas is produced at a pressure of 752 torr and 25.8 °C. Write an e...

Solved • Fri Jun 03 2016 15:03:56 GMT-0400 (EDT)

Gas Stoichiometry

#### Q. A 2.85-g sample of an unknown chlorofluorocarbon decomposes and produces 564mL of chlorine gas at a pressure of 752mmHg and a temperature of 298 K. Wh...

Solved • Fri Jun 03 2016 14:44:46 GMT-0400 (EDT)