Qstnid -2- In The Hcl Molecule, The Separation Between The Nuclei Of The Two Atoms Is About 1.27 A (1 A = 10<sup>-10</sup>m). Find The Approximate Location Of The Cm Of The Molecule, Given That A Chlorine Atom Is About 35.5 Times As Massive As A Hydrogen Atom And Nearly All The Mass Of An Atom Is Concentrated In Its Nucleus. - 07: System Of Particles And Rotational Motion

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In the HCl molecule, the separation between the nuclei of the two atoms is about 1.27 A (1 A = 10^-10m). Find the approximate location of the CM of the molecule, given that a chlorine atom is about 35.5 times as massive as a hydrogen atom and nearly all the mass of an atom is concentrated in its nucleus.
Ans : Let us choose the nucleus of the hydrogen atom as the origin for measuring distance. Mass of hydrogen atom,m₁= 1 unit (say) Since cholorine atom is 35.5 times as massive as hydrogen atom,

.•. mass of cholorine atom, m₂ = 35.5 units