Multiple choice general knowledge

The mass of one Avogadro number of helium atom is

  1. 4.00 gram

  2. 5.00gram

  3. 6.00gram

  4. 7.00gram
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A Correct answer
Explanation

The atomic mass of helium is approximately 4 atomic mass units (amu), so one mole (Avogadro's number) of helium atoms has a mass of about 4 grams. This is a direct application of the mole concept: molar mass in grams equals atomic mass in amu.

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