what does the statement "1 mole of hydrogen" represents?

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Solution

Dear student,
One mole of a substance (atoms, molecules, ions, or particles) is that quantity in number having a mass equal to its atomic or molecular mass in grams. One mole of any substance contains 6.022 x 10²³ particles (atoms, molecules, or ions), which is termed as Avogadro number or Avogadro constant.
1 mole of hydrogen atoms represents 6.022 × 10²³ hydrogen atoms or 1 mole of hydrogen molecules represent 6.022 × 10²³ hydrogen molecules.
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