Mixing iron nitrate (Fe(NO₃)₃) and hydrogen peroxide (H₂O₂) will not produce a gas. Instead, you will likely observe a color change and the formation of a precipitate.

Here's why:

* Iron nitrate is a strong oxidizing agent.

* Hydrogen peroxide is also an oxidizing agent, but it can also act as a reducing agent depending on the conditions.

When these two compounds are mixed, the iron nitrate acts as the oxidizing agent and oxidizes the hydrogen peroxide. This reaction results in the formation of iron(III) oxide (Fe₂O₃), which is a reddish-brown precipitate, and water (H₂O). The reaction can be represented as follows:

2 Fe(NO₃)₃ + 3 H₂O₂ → Fe₂O₃ + 6 HNO₃ + 3 H₂O

Important Note: The exact products and outcome of this reaction can vary depending on the concentrations of the reactants, temperature, and other factors. It's always important to perform chemical reactions in a controlled environment with proper safety precautions.