First and second ionisation energies of Be_((g)) are 900 kJ mol_(1)and 1750 kJmol_(1) approximately. Claculate approximate percentage of Be^(2+)_((g)) ions, if 1 g of Be_((g)) absorbs 150 kJ of energy [atomic weight of Be is 9].

First and second ionisation energies of Be_((g)) are 900 kJ mol_(1)and

1.	First and second ionisation energies of Be_((g)) are 900 kJ mol_(1)and 1750 kJmol_(1) approximately. Claculate approximate percentage of Be^(2+)_((g)) ions, if 1 g of Be_((g)) absorbs 150 kJ of energy [atomic weight of Be is 9].
Answer» Solution :(i) AMOUNT of energy ABSORBED by 1 g of Be to FORM `Be^(+) and Be^(+2)` (ii) energy REQUIRED for conversion of 1 g `Be_((g)) into `Be^(+)` ions (iii) calculation of additional amount of energy (iv) conversion of `Be^(+)` ions to `Be^(+2)` ions (v) 25%.