The answer depends somewhat on the substance, but if it is suitable for infrared spectroscopy analysis and there are not interferences present, there are characteristic spectral lines for the carbon-carbon double bonds characteristic of alkenes. Nuclear magnetic resonance and/or Raman spectra should also work normally, but are much less widely available.
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check for changes in the temperature of the chamber
Scientists collect the ozone concentration. This gives them an idea to check the thinning.
To garner more information and dataTo check or test hypotheses and theories
A gram atomic mass of helium (He) contains the same number of atoms as 1 mole of helium. Since 1 mole of any substance contains approximately 6.022 x 10^23 atoms, a sample of helium with a gram atomic mass would contain that same number of atoms.
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experiment
experiment
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check out http://www.managementscientist.org for answers
check out albert Einstein the scientist.
check for changes in the temperature of the chamber
completeness check
check the substance was in the correct container and locked away
israel scientist............i think,............/!
khj
Because they want to check what is in the core of the earth.