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Justice Riddle
Chemistry
19 December, 09:16
How many atoms are found in 12.0 grams of Helium?
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Beckham Pollard
19 December, 09:28
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One mole of helium has a mass of 4.0 grams. In 12 grams there are 3 moles of He. Each mole contains 6.022x10^23 atoms of helium. Therefore, 3 moles of He will contain 3 times as many atoms or 1.806x10^24 atoms.
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Alan Atkins
19 December, 09:45
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Each mole contains Avagodro's number of atoms i. e. 6.023x10^23, so
3 moles x 6.023x10^23 atoms/mole = 18.069x10^23 atoms = 1.8x19^24 atoms
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