why u soo worried? nothing to worry about.. there is literally nothing to study for english.. its just comprehension and writing.
edit: u sure u post this in the correct thread? yur in yr 10 or yr 11?
lol dude you can get them on the board of studies website and im pretty sure answers are there aswell(not sure if theres any band 6 answers that u want) ;D
of course it'll count if you do general maths which is a 2 unit course. i think ur getting messed up and confused with how people call it like 2/3/4 unit maths lol :D
yeah similar to google's explanation, just swap them around so for e.g. Mg has a charge of 2+ and its reacting with Nitrogen which has a charge of 3- it will yield Magnesium Nitride - Mg3N2..