The number of electrons in of ion is: — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question
Question
The number of electrons in $1.6\text{ g}$ of $O_2^{2-}$ ion is:
Answer: A
💡 Solution & Explanation
$\text{Moles of } O_2^{2-} = 1.6 / 32 = 0.05\text{ mol}$. <br>Electrons per ion $= 8 \times 2 + 2 = 18$. <br>Total electrons $= 0.05 \times 18 \times N_A = 0.9 N_A$.
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