<span>The atmosphere is composed
mainly of air molecules. And air molecules consist of 21% oxygen and 79%
nitrogen. Oxygen is used for a lot of things. It used for cellular respiration,
for humans to breathe and other complex chemical reactions that needs oxygen. Nitrogen
is one of the important nutrients mostly used in the soil of the plants. It is
used for protein synthesis. Nitrogen is also absorbed by the plants from the
and the soil to complete the necessary reactions. </span>
NH3 is soluble in water because it has the same amount of intermolecular forces as water. NH3 is a polar molecule and water is a polar molecule so they dissolve each other. NCl3 does not dissolve in water because it is a nonpolar molecule which is different with water. NCl3 is nonpolar due to the difference in electronegativities between 3 atoms of Cl and 1 atom if N2.
No they would not because Lake Michigan is 52 degrees and a person at that body temp would freeze
Answer: It if it chemical they can see if it formed solid or gas. For physical Shape, temperature and finally color can be a sign of both physical and potentially a chemical change.
Hope that is what they were looking for. Good luck and I hope this helps :)
