Answer :
Final answer:
The mass of one mole of helium gas is 4.00 grams, derived from its atomic mass unit and the concept of molar mass. The correct option is B) 4.00 g.
Explanation:
The subject of the student question is about the mass of one mole of helium gas.
This is derived from the fact that the atomic mass unit (u) of helium is approximately 4 u. In theory, one mole of any substance consists of 6.02 x 10^23 atoms (this is known as Avogadro's number), and hence one mole of helium atoms would have a mass of 4 grams.
A factor to consider is the concept of molar mass, which is the weight of one mole of any given substance. The molar mass of helium is 4.00 g/mol. In other words, if you were to weigh one mole of helium, it would have a mass of 4.00 grams.
Learn more about Molar mass here:
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