Learn general ideas at
http://www.physicsforums.com/showthread.php?t=9021Shame that we have to link to our competitors
Very basic:
MnO_4^- - should render as MnO
4-MnO_{4}^{2-} - should render as MnO
42-Dissociation constant:
K_a=\frac{[H^+][A^-]}{[HA]}
Note how curly brackets group expressions. Formatting is done completely automatically, in LaTeX you only describe formula. That's how TeX/LaTeX works when used for DTP.
OpenOffice uses its own engine, in some respects compeletely different. For example use of {} for charges is a little bit tricky and fractions are defined in a different way:
K_a = {[H^{{}+{}}][A^{{}-{}}]} over {[HA]}
Still, once you get used to that - it works perfectly. See my pH lectures.
http://www.chembuddy.com/?left=pH-calculation&right=pH-salt-solutionScroll down to the last equation on the page
{C_a sum from{i = 1} to{n} iK_{ai} left[ H right] ^{n-i}} over {left[ H right]^n+sum from {i =1} to {n} K_{ai}left[ H right]^{n-i}} + K_w over left[ H right] = { C_b sum from{i = 1} to{m} iK_{bi}left[ H right]^i K_w^{m-i}} over { K_w^m + sum from {i=1} to {m} left[ H right]^i K_{bi}K_w^{m-i}}+ left[ H right]
For me main reason for using OpenOffice is that it is free, as opposed to rather costly MSOffice. Functionality is similar, although OO is sluggish at times.