How many atoms in 3 moles helium?

Answer 1

For this you need the atomic (molecular) mass of H2. Take the number of moles and multiply it by the Atomic Mass. Divide by one mole for units to cancel.

3.00 moles H2 × 2.02 = 6.06 grams H2

Answer 2

There are approximately 1.806 x 10^24 atoms in 3 moles of helium. This calculation is based on Avogadro's number, which is approximately 6.022 x 10^23 atoms per mole.

Answer 3

3 moles of Helium would have a mass of 12g

Answer 4

1 mole has 6.023 x 1023 atoms.

So 3 moles have 3 x 6.023 x 1023 atoms

Answer 5

3 moles of helium are equivalent to 12 g.