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Question 51

Which state describes elemental hydrogen at 25 degrees Celsius and 1 atmosphere?

  1. A gas at these conditionsCorrect answer
  2. A liquid at these conditions
  3. A solid at these conditions
  4. The same state as liquid water

Explanation

Elemental hydrogen is a gas under the stated conditions. Hydrogen atoms bound inside liquid water do not make the elemental substance liquid, because a compound and its constituent elements have different properties.

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