posted by Meenaakshi .
Which is the correct formula for
I'm not sure which is the correct one out of these two:
At the instance, I've choosen option a). Is my naming correct?
I would go with a also. b appears to be just the trimer of a and unless we know the compound is a trimer (and thus the molecular formula instead of the empirical formula) I think the empirical formula is the way to go. You know we write NaCl even though it really is NaxClx.