If 10 ppm of nitrogen dioxide is present 1000 L of air at a pressure of 1 atm and temperature of 27 °C, what is the amount of ammonia necessary to react?

To determine the amount of ammonia necessary to react, we need to set up and solve a stoichiometry problem using the balanced chemical equation for the reaction between nitrogen dioxide (NO2) and ammonia (NH3). However, the balanced equation is missing, so it's not possible to provide an accurate answer without that information.

To find the balanced equation, we would need additional information about the specific reaction conditions and reactants involved. Once we have the balanced equation, we can proceed with the stoichiometry calculations.

If you have the balanced equation for the reaction, please provide it, and I will be happy to guide you through the calculations.