I'm confused about how to do these problems, I thought I was doing it right, but I think I might be wrong.

The Honda Civic Hybrid is a compact car. It gets a combined highway and city fuel efficiency 17.8 kilometers per liter (42.0 miles per gallon). Calculate each of the following:
(a) Liters (gallons) of gasoline per year, assuming an average of 19,300 kilometers (12,000 miles)
(b) Kilograms (pounds) of CO2 produced per year, assuming combustion of gasoline releases 2.3 kilograms per liter (19 pounds per gallon
(c) Hectares (acres) of tropical rainforest needed to take up CO2 produced per year, assuming the annual uptake of an undisturbed forest is 0.5 kilograms of CO2 per square meter
For (a) I did 19.3 l./1gal. x xgal/0.265 and got approximately 5.1.

Thank you for the help ^-^

To calculate the liters (or gallons) of gasoline used per year, you need to use the given fuel efficiency of the Honda Civic Hybrid. The car's fuel efficiency is given as 17.8 kilometers per liter (or 42.0 miles per gallon).

To calculate (a) Liters (gallons) of gasoline per year, assuming an average of 19,300 kilometers (12,000 miles), you can use the following steps:

(a) Liters of gasoline per year:
1. Convert kilometers to miles (if necessary): 19,300 kilometers = 12,000 miles.
2. Divide the total miles by the car's fuel efficiency to get the gallons used: 12,000 miles ÷ 42.0 miles per gallon = approximately 285.7 gallons.
3. Convert gallons to liters: 285.7 gallons × 3.78541 liters per gallon (conversion factor) ≈ 1080 liters.

So, the approximate amount of gasoline used per year is 1080 liters.

In your calculation, you correctly converted kilometers to miles, but there was a mistake in your conversion from gallons to liters. 19.3 l./1 gal is correct, but the conversion factor you used (x gal/0.265) is incorrect. The correct conversion factor is 3.78541 liters per gallon.

If you plug in the correct conversion factor, your calculation would be as follows:
19.3 l./1 gal × 1 gal / 3.78541 l. ≈ 5.1 gallons.

However, since the question asks for liters of gasoline per year, your final answer would be 5.1 gallons converted to liters, which is approximately 19.3 liters.