Response:

Water + H2 + Fe + nitro + O2 + Magnesium Fire:
When water, hydrogen (H2), iron (Fe), nitro compounds, oxygen (O2), and magnesium are involved in a fire, it can become extremely dangerous and difficult to extinguish. The combination of these elements can lead to a vigorous and potentially explosive fire due to the reaction between magnesium and oxygen, which produces intense heat.

Extinguishing the Fire:
To extinguish a fire involving magnesium, water should not be used as it can actually exacerbate the fire by producing hydrogen gas. Instead, a dry powder fire extinguisher specifically designed for metal fires, such as a Class D extinguisher, should be used. This type of extinguisher contains a special dry powder that smothers the fire and prevents reignition.

Special Considerations:
It is important to approach fires involving magnesium with caution due to the high risk of re-ignition. Additionally, proper training and protective gear should be used when attempting to extinguish such fires to ensure the safety of individuals involved.
In conclusion, fires involving magnesium and other reactive elements require special attention and specific extinguishing methods to ensure the safety of individuals and property. Using the correct type of fire extinguisher and taking appropriate precautions are crucial in effectively managing such fires.