The primary hazards of liquid hydrogen are cryogenic (things get too cold and injure you with their cold) and fire and explosions (hydrogen is extremely flammable.
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Liquid hydrogen is highly flammable and can ignite easily when exposed to air. It is also cryogenic, which means it can cause severe frostbite upon contact with skin. Additionally, hydrogen gas released from liquid hydrogen can displace oxygen in the air, leading to asphyxiation in enclosed spaces.
The chemical formula for liquid and gaseous hydrogen is the same - H2However, Liquid hydrogen is usually written as LH2 with the L specifying that it is in the liquid state.
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Liquid hydrogen has a boiling point of -252.87 degrees Celsius.
Hydrogen peroxide is a liquid at room temperature, so its state of matter is liquid.
The temperature of liquid hydrogen is around -252.87 degrees Celsius or -423.17 degrees Fahrenheit.