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vagabundo [1.1K]
3 years ago
10

How many moles are 1.20 x 1025 formula units of calcium iodide?

Chemistry
1 answer:
madam [21]3 years ago
6 0

Answer:

19.9 mol

Explanation:

Use <em>Avogadro’s number</em> to convert formula units of CaI₂ to moles of CaI₂.

1 mol CaI₂ ≡ 6.022 × 10²³ formula units CaI₂

Moles of CaI₂ = 1.20 × 10²⁵ × (1 /6.022 × 10²³)

Moles of CaI₂ = 19.9 mol

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Explanation:

  • All elements that found in nature has heat of formation (Hf) equal 0 J/mol.
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