9.18 h ow many possible isomers are there of an octahedral complex having the formula m(abc)(nh3)(h2o)br, where abc is the tridentate ligand h2nic2h4iphic2h4iash2? how many of these consist of pairs of enantiomers? sketch all isomers, showing clearly any pairs of enantiomers. the tridentate ligand may be abbreviated as n—p—as for simplicity.

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !