Question

Total no. of electrons in 48 g Mg 2+

Answer 1

molar mass :- Mass of the one mole of the substance .
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Number of electrons in one Mg2+ = 10
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number of moles

= mass/molar mass

= 48/24

= 2 mol
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we know that 1 mol of any substance contains Avogadro number of molecules/atoms/ions .so the relation is given by.

ions = number of moles × 6.022 × 10^23

ions = 2 × 6.022 ×10^23

ions = 12.044 ×10^23
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so 12.044 ×10^23 ions have

= 12.044 ×10^23 × 10

= 12.044 ×10^24

= 12044 ×10^21 electrons
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