Most of the light passes through glass but none of the light passes through metal.
Answer:
Atmospheric nitrogen is not heavier than chemical nitrogen, largely because “chemical nitrogen” is ultimately derived from atmospheric nitrogen. On the other hand, you could be asking why the atomic mass of nitrogen is not the same as the mass of nitrogen gas; that's because gaseous nitrogen is diatomic, .
Explanation:
This is from Google.
Hope this helps :))
I am not sure about the first question but the temperature has an important role in this situation because as the temp goes up particles moves at a faster speed and spread out every where.
Option B, They cannot be separated by using physical properties
I'll go over why the other three options are wrong.
Option A - Boiling water would break the Intermolecular Forces between molecules (Essentially, the force that keeps water molecules stuck together will break, not the force that holds the atoms together)
Option C- Water isn't a mixture (Assuming that it's distilled), and so filtering it would do absolutely nothing.
Option D - There aren't any metallic bonds in water, only polar covalent bonds.
Thus, the only answer left is Option B.
Let me know if you need me to explain anything I mentioned here.
-T.B.