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i just wanna know wat marks u guys are aiming for in 4u HSC. i wanna hav an idea of wat mark i should be aiming for, coz at the moment i hav no idea.

anyone done the independant trials yet?

thnx to the both of u. i thought i was right . just needed to double check

In 1776, the Frenchman Antoine Lavoisier discovered that many compounds with oxygen (non-metallic oxides) developed acidic properties in solution. He defined an acid as a non-metal compound containing hydrogen. is there anything wrong with this statement? i got these from a set of notes and...

oh ok i get you thanx for the help

ive been told that acid + base gives salt and water. if so can som1 tell me if its the same for ammonium nitrate poduction from HNO3 and NH3