Answer
0.0174 M
Work Step by Step
BAC is grams alcohol/100mL of blood. To get to molarity, first we need to express it in terms of grams/L as follows:
0.08 grams/100mL * (1000mL/1L) = 0.8 grams/L
Then we convert to moles using the molar mass of alcohol, which we need to find:
CH3CH2OH
Carbon has a mass of 12
Hydrogen has a mass of 1, 1*3 = 3
Carbon has a mass of 12
Hydrogen has a mass of 1, 1*2 = 2
Oxygen is 16
H is 1
12+3 + 12 + 2 + 16 + 1 = 46 g/mol
Then we have:
0.8grams/L * (1mol/46grams) = 0.0174M
