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Answer :
360 grams of arsenic contains more atoms.
- First, calculate the number of moles of phosphorus and arsenic in 360 grams of each element:
- For phosphorus:
- Atomic mass of phosphorus (P) = 30.97 g/mol
- Number of moles = Mass / Molar mass = 360 g / 30.97 g/mol ≈ 11.63 moles
- For arsenic:
- Atomic mass of arsenic (As) = 74.92 g/mol
- Number of moles = Mass / Molar mass = 360 g / 74.92 g/mol ≈ 4.80 moles
- Next, calculate the number of atoms using Avogadro's number (6.022 x 10^23 atoms/mol):
- For phosphorus: Number of atoms = Number of moles * Avogadro's number
≈ 11.63 moles * 6.022 x 10^23 atoms/mol ≈ 7.00 x 10^24 atoms
- For arsenic: Number of atoms = Number of moles * Avogadro's number
≈ 4.80 moles * 6.022 x 10^23 atoms/mol ≈ 2.89 x 10^24 atoms
Complete Question:
Which contains more atoms, 360 grams of phosphorus or 360 grams of arsenic?
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