Skip to main content
The reaction between NO2 and H2 gas produces NH3 and H2O gas.
2 NO2 (g) + 7 H2 (g) → 2 NH3 (g) + 4 H2O (g)
In a particular reaction, NO2 gas (23.1 L, 783 torr, 68.0 °C) was mixed with H2 gas (24.8 L, 731 torr, 75.0 °C) which produced 4.67 L of NH3 gas at STP. Calculate the % yield of the reaction.
A compound used as a preservative is made up only of C, H, O, and Na. At STP, a sample of the compound weighing 100 mg was burned with excess oxygen. After the reaction is complete, 108.88 mL of CO2 and 38.88 mL of H2O were produced. In a separate analysis, it was found that the sample contains 15.96 mg of Na. Determine the molecular formula of the preservative.
A sample of Ne gas has a volume of 3.60 L at a pressure of 1.4 atm and a temperature of 20 ºC. Determine the volume of the Ne sample at STP.
Compare the density of Cl2 and Kr at STP if both gas are in separate 2-L flasks.
Vehicular impacts trigger the chemical reaction NaN3(s) → Na(s) + N2(g) [unbalanced], which inflates air bags. Calculate the moles of NaN3 required to inflate a 10.5 L air bag at STP.
What is the molar mass of a gas if 285 mL of the gas weighs 2.33 g at STP?
