Skyy vodka contains 40% alcohol.
It would depend on where you got it from, but most legally distilled vodka would be between 37% and 41% by volume alcohol. It does not matter what size the bottle is.
Typically, none. Vodka has calories, but they are all derived from the alcohol; there is no sugar in there, the sugars will have been turned into alcohol by the yeast.
There is no sugar, sodium, carbs, fat or cholesterol in vodka.
Mohawk Vodka generally has a 1-3% alcohol content depending on which of their flavours/products you consume.
1 liter
Around £13
30%
About $20.
6% proff
none
I assume you mean what's the weight in ounces of a volumetric ounce of vodka. One liter of vodka (33.814 volumetric oz) weighs 33.404 ounces, so one liquid ounce of vodka would weigh .98787 ounces. That's for vodka that's 40% alcohol - the number might be slightly different for different proofs.