chem
posted by mel .
C6H12O6(aq)>2 C2H5OH(aq) + 2CO2(g)
Fermentation of 744mL grape juice(density=1.0 g/cm^3) is allowed to take place in a bottle witha V of 825mL until 12% by volume is ethanol (C2H5OH). Assuming CO2 is insoluble in H2O what would the pressure be of the CO2 inside the wine bottle at 34C (density of ethanol is .79g/cm^3

Write the balanced equation.
Convert mL grape juice to grams using density given and convert that to mols.
Convert 12% by volume of ethanol to grams, then to mols,
Convert mols ethanol produced to mols CO2 using the coefficients in the equation.
Use PV = nRT to calculate the pressure.
n is the # mols CO2 calculated above. Don't forget to change T to Kelvin. Note: You may need to correct for the volume. The empty space above the level of the grape juice starts out at 825 mL  744 mL but it will be different at the end since ethanol has a different density than grape juice.
Post your work if you need additional assistance.