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.
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.
The scientist should check for variations in temperature, the number of moles of gas present, or the nature of the gas molecules (e.g., size, shape, mass). These factors can affect the gas pressure in a sealed chamber with a fixed volume according to the ideal gas law.
Please check and rephrase your question as it makes no sense
check
experiment
experiment
check out http://www.managementscientist.org for answers
completeness check
israel scientist............i think,............/!
Because they want to check what is in the core of the earth.
khj
check the substance was in the correct container and locked away
sucker!
Scientists collect the ozone concentration. This gives them an idea to check the thinning.
communicating