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प्रश्न
Compute the difference in masses of 103 moles each of magnesium atoms and magnesium ions.
(Mass of an electron = 9.1×10–31 kg)
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उत्तर
Mg+2ion = 10 electron
Mg atom = 12 electrons
Difference between Mg2+ and Mg = 2 moles of electrons
The difference between 103 moles of Mg and 103 moles of Mg2+ = 103 × 2 moles of electrons
Mass of 103 × 2 moles of electrons
= 2 × 103 × 6.022 × 1023 × 9.1 × 10−31 kg
= 1.096 × 10−3 kg
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| Species Property | H2O | CO2 | Na atom | MgCl2 |
| No. of moles | 2 | - | - | 0.5 |
| No. of particles | - | 3.011×1023 | - | - |
| Mass | 36g | - | 115 g | - |
