Homework Help: Chemistry

Posted by megzie12 on Tuesday, January 29, 2008 at 3:56pm.

In Europe, gasoline efficiency is measured in km/L . If your car's gas mileage is 28.0 mi/gal, how many liters of gasoline would you need to buy to complete a 142-km trip in Europe? Use the following conversions: 1km=(0.6214mi) and 1gal= (3.78L)

Chemistry - DrBob222, Tuesday, January 29, 2008 at 4:13pm
Convert 28.0 mi/gal to km/L. Use the conversion factors shown.
28.0*(1 km/0.6214 mi)*(1 gal/3.78 L) = ?? km/L. Notice how the units you don't want (mi and gal) cancel and leaves the units you want to keep(km and L). You need to go through the calculation but the km/L is about 12.
Then 142 km/12 km/L = ?? Again, you will need to use the correct value instead of 12. Post your work if you get stuck. Check my arithmetic. Check my units.
Chemistry - megzie12, Tuesday, January 29, 2008 at 4:33pm
11.9L
- Chemistry - DrBob222, Tuesday, January 29, 2008 at 4:34pm
  That's correct.
Chemistry - Heather, Saturday, January 21, 2012 at 6:03pm
15.9 L is the CORRECT ANSWER

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