1. 1 gallon of gasoline weighs 6.3 pounds(or 2.85 kg). Assuming the gasoline is pure octane (C8H18) calculate the total mass of carbon dioxide produced from the efficient combustion(meaning the only byproducts are carbon dioxide and water)of 1 gallon of gasoline. Show the chemical equation and mass balance. 2. Identify the four historical byproducts (emissions) from burning gasoline in addition to carbon dioxide and water. For each of the emission categories briefly explain the main associated environmental impact. 3. Explain why hardwood has a lower energy density than charcoal. Compositionally, what is different between these two materials and how does that impact emissions during combustion? Explain which of these two materials is a superior heating fuel source using a life cycle perspective. 4. Based on the EPA reported composition of MSW (from the lecture slides), propose an alternative end of life fate for each category and explain what the primary value or benefit would be over landfilling