If the distance between the centres of the atoms of potassium and bromine in KBr molecule is 0.282 xx 10^(-9) m, the centre of mass of this two particle system from potassium is (mass of bromine = 80 u and of potassium = 39 u).

If the distance between the centres of the atoms of potassium and brom

1.	If the distance between the centres of the atoms of potassium and bromine in KBr molecule is 0.282 xx 10^(-9) m, the centre of mass of this two particle system from potassium is (mass of bromine = 80 u and of potassium = 39 u).
Answer» `9.3xx10^(-2)NM` `18.96 xx10^(-2)nm` `27.9xx10^(-2)nm` `3.3xx10^(-2)nm` ANSWER :B