As you get higher the atmospheric pressure lowers. The pressure in the packet of crisps has the pressure at which it has been closed (pressure at the surface of the earth). This means that the air molecules in the packet press harder outside than the air molecules in the atmosphere press on the packet.
Answer:
Tin (Sn) as in the periodic table the element tin has 50 protons
I believe KI is not a a binary molecule.
Your welcome
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