Answer:
The stratosphere contains 9.9% of air mass over the Earth. 90% of the ozone layer is found in the stratosphere's upper crust. For more information, look it up. Oh and by the way, airplanes fly in this layer. Hope this helps. Good luck on anything your doing. Please mark brainliest if you feel like it, I would really appreciate it.
The atoms under this question can be found elsewhere and as follows:
chlorine (Cl) - 3.61
sulfur (S) - 2.58
hydrogen (H) - 2.2
oxygen (O)- 3.44
<span>fluorine (F)- 4
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<span>Based on difference in electronegativities between atoms, the most polar bond pair would be hydrogen and fluorine. They have the highest electronegativity difference.</span>
The chemical formula for water is H2O which means that every molecule of water has 2 atoms of hydrogen