Al3+ is cation due to its positve charge
N3- is an anion due to its negative charge
B) hydrogen gas burns in air.
explanation: the rest are physical properties.
I would say that you should wear a lab coat, safety goggles, and gloves
when the teacher says so - not everything in a lab is dangerous, so
there is no need to always wear these. But when the teacher says you
should - then you should.
I because it is an acid, it should be soluble in hexane
