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Answer:

  • 5.025x10²⁴ atoms
  • 1.6686 moles
  • 123.63 g

Explanation:

In one Ca(OH)₂ molecule, there are 5 atoms (1 Ca, 2 O and 2 H). This means that in 1.005x10²⁴ Ca(OH)₂ molecules, there are (5 * 1.005x10²⁴) 5.025x10²⁴ atoms.

To convert molecules into moles, we use Avogadro's number:

  • 1.005x10²⁴ molecules * [tex]\frac{1mol}{6.023*10^{23}molecules}[/tex] = 1.6686 moles

Finally, we convert moles into grams using the molar mass of Ca(OH)₂:

  • 1.6686 moles * 74.093 g/mol = 123.63 g

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