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What are measures of despersion used for?
to spread widly
Is range is not considered to be an index of despersion?
The sample range could be used as an index of dispersion. However, there are objections. One is that this statistic is obviously sensitive to outliers. Another is that for many population distributions there are measures with much better characteristics, even ignoring the problem of outliers.
What is the strongest intermolecular force present in HCN?
The strongest intermolecular force present in hydrogen cyanide (HCN) is dipole-dipole interactions. This is because HCN is a polar molecule with a permanent dipole moment due to the electronegativity difference between hydrogen, carbon, and nitrogen atoms. Dipole-dipole interactions occur when the positive end of one molecule is attracted to the negative end of another molecule.
How an absorption spectrum can identify a star's composition?
By looking at the lines in a star's spectrum of light, astronomers can tell what kinds of elements the star is made of. This happens because when a beam of light hits an atom or molecule, that atom absorbs a characteristic wavelength (color) of visible light. Scientists have made a huge list of different elements and the different patterns of lines observed in theirj corresponding "spectra" (fancy word for light spectrums), and by using such lists can deduce precisely what each star is made of.
