If you have a bunch of tabs open in chrome, you are probably lucky to get 5 hours (I didn't time).
I'd say avoid using Chrome — its known to be a battery killer.
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How much of a difference is there between the new 2017 MBP and a 2007 MBP ?
Well, let me put it like this: the GPU is over 20 times faster and the storage about 50 times faster. Hope that puts things in perspective.