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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

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βˆ™ 15y ago
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βˆ™ 4mo ago

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.

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βˆ™ 15y ago

3 moles of Helium would have a mass of 12g

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βˆ™ 11y ago

1 mole has 6.023 x 1023 atoms.

So 3 moles have 3 x 6.023 x 1023 atoms

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βˆ™ 8y ago

3 moles of helium are equivalent to 12 g.

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Q: How many atoms in 3 moles helium?
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