Question #03651

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Question #03651

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Answer 1 · 2018-02-10T06:48:24

$1.204 \cdot 10^{23}$ $1.204*10^23$ ions

Explanation:

First, convert grams into moles.
#5.61 g CaO (1 mol/56.077 g) = 0.100 mol CaO

Next, find the number of molecules in 1 mole of CaO
$1 m o l = 6.022 \cdot 10^{23}$ $1 mol = 6.022 * 10^23$ molecules

Use that to convert moles into molecules.
$0.100 m o l C a O (6.022 \cdot 10^{23}$ $0.100 mol CaO (6.022 * 10^23$ molecules $/ 1 m o l) = 6.022 \cdot 10^{22}$ $/1 mol) = 6.022 *10^22$ molecules

Finally, find the number of ions in 1 molecule, and use that to find the number of ions.
CaO = Ca2+ + O2- $\to$ $rarr$ 2 ions per molecule
$6.022 \cdot 10^{22}$ $6.022 *10^22$ molecules $(2$ $(2$ ions $/ 1$ $/1$ molecule $) = 1.204 \cdot 10^{23}$ $) = 1.204 *10^23$ ions

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Question #03651

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