a.  Unhealthy exhaust results from the combustion ofoctane (C8H10) in automobile engines via the followingreaction.

C8H18(l) + 25O2(g)  16CO2(g) + 18H2O(g)

Assuming the gasoline is pure octane and that a suburban dwellerburns about 6.44 x 104grams of octane (about 20 gallons) per week.How many grams of CO2 are produced (per week) to warm the globe? At25oC and 1.00 atm, how many ml of CO2 are produced? Give youranswer in scientific notation,

b.   During combustion, N2 and O2 in the air react tomake the nasty brown gas NO2which is smog. The smog rises up intothe atmosphere, combines with water vapor and rains down as nitricacid (HNO3) to acidify all the lakes and streams and kill the fishand plants. The following reactions are relevant.
A. O2(g) + N2 (g)  2NO(g)

B. 2NO(g) + O2(g)  2NO2(g)

C. NO2(g) + H2O(g)  HNO3(aq) + NO(g)

Balance reaction C. Calculate the moles of HNO3 that form if 2.2x 10-4 moles of NO2rise up into the air and react completely withan unlimited amount of water vapor.

  c.    A 200 mL sample of thelake water is collected titrated directly with 0.01M NaOH and ittakes only 3 mL of the NaOH titrant to reach the equivalence point.Calculate the molarity (M) of HNO3 in the lake water.

d. Nitric acid is a strong acid and engages in the following‘proton’ transfer(dissociation) reaction with water (in which it isdissolved).

HNO3(aq) + H2O(l)  H3O+(aq) + NO3-(aq)

Suppose the concentration of HNO3 in the lakewater is 0.08mg/mL. Calculate the molarity of H3O+ and the pH of thelakewater.