What is the total amount of money in any given bank account insured by the FDIC?_____ is the total amount of money in any given bank account...

I think that the answer you are looking for is $250,000. 
Of course, this does not mean that you get $100,000 back if your bank goes broke and you
only had $250,000 in your account.  What it means is that the FDIC will only insure the
first $250,000 in any given bank account.  As the FDIC's website
says,

The
standard deposit insurance amount is $250,000 per depositor, per insured bank, for each
account ownership
category.

The FDIC was set up
so that people could deposit money in banks without having to fear that their deposits
would be lost in the event of a bank failure.  To that end, the FDIC guarantees that
people will get their deposits back so long as those deposits do not exceed
$250,000.