State the percentage, by volume, of nitrogen in dry air.
The equation shows the equilibrium between nitrogen and oxygen in a closed container at high temperature. $\text{N}_2(g) + \text{O}_2(g) \rightleftharpoons 2\text{NO}(g)$ Predict what happens to the position of equilibrium when the pressure is increased. Explain your answer.
The table gives the concentration of nitrogen(II) oxide, NO, in the closed container at three different temperatures. State what this tells you about the enthalpy change of the forward reaction. Explain your answer.
Nitrogen(II) oxide, NO, reacts with hydrogen to form ammonia and water. Write the equation for this reaction.
State one source of nitrogen oxides in the atmosphere.
Nitrogen oxides are a cause of acid rain. State one effect of acid rain on buildings.
State the formula of the ion found in all acids.