The chemical formula does not show how the atoms are connected to one another.
When we write the chemical formula of any substance, we are not able to understand the spatial arrangement of that substance's atoms. This is extremely important in organic compounds, which exhibit different physical characteristics as well as different chemical characteristics due to the way their atoms are arranged in space. These isomers are known as enantiomers.
Simple 6L of air times the .21L of O2 = 1.26
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The gravitational pull of the moon is not strong enough to attract a significant atmosphere.
