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Question

Compute the number of ions present in 5.85 g of sodium chloride.

A
1.2042×1023 ions
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B
1.2042×1026 ions
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C
1.2042×1029 ions
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D
1.2042×1030 ions
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Solution

The correct option is A 1.2042×1023 ions
According to given data,
5.85 g of NaCl=5.8558.5=0.1 moles of NaCl particle
Each NaCl particle contains 2 ions Na+ and Cl
Total moles of ions =0.1×2 =0.2 moles
No. of ions =0.2×6.022×1023 =1.2042×1023 ions

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