Answer
315.56 grams of ethanol
Work Step by Step
You have 1L of vodka, which is 6.86 M, which means 6.86 mol/L. Therefore you have 6.86 mol/L * 1L = 6.86 moles of alcohol. Now we need to convert this to grams so we need to find the molar mass of ethanol.
CH3CH2OH
C is 12
H is 1, 3*1 = 3
C is 12
H is 1, 2*1 = 2
O is 16
H is 1
12 + 3 + 12 + 2 + 16 + 1 = 46 g/mol
Then we have 6.86 moles * (46 g/moles) = 315.56 grams
