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Is this a good idea?

So should i have, um, like, more than one related text? :confused:

Classes: 2U Mathematics Chemistry Physics Adv English English Ext 1 Ancient History Engineering St I'm getting marks ranging from 75-88 in all except for maths which is about 95. Also, my school is ranked 650 so that kinda sucks. What do you guys reckon?

we have a titration prac assessment coming up and i'm pretty sure we're going to be using Na2CO3 to make our primary standard. one problem: the goddam powder is impossible to dissolve... so we end up with the wrong answers. our teacher doesn't care so does anyone around here have any tips on...