"how many hours" / "for how many hours"

[Veggie]

Hello everyone,

Which one is correct?

She is not aware of how many hours she has slept.
She is not aware of for how many hours she has slept.
*
She is not aware of how much she has slept.
She is not aware of for how much she has slept.

 

[SoothingDave]

Do not use "for" here.

 

[Veggie]

Thanks!