HELP!!!! I am taking an intro level chemistry class and I am getting so stuck on conversions!!!! i can get them while i work with someone else but i get lost on my own. Here is the problem i am having trouble with:

suppose an automobile requires 56.08 kg of gasoline to fill the tank. the density of gasoline is .796 g/mL. what volume (in gallons) of gasoline was added to the tank? (1 gallon=3.81 liters)

Question

HELP!!!! I am taking an intro level chemistry class and  I am getting so stuck on conversions!!!! i can get them while i work with someone else but i get lost on my own. Here is the problem i am having trouble with:

suppose an automobile requires 56.08 kg of gasoline to fill the tank. the density of gasoline is .796 g/mL. what volume (in gallons) of gasoline was added to the tank? (1 gallon=3.81 liters)

anonymous · Answer

How does your instructor want it set up? There are a couple different ways

anonymous · Answer

The way that I like (and I'm going to use just 50.00 kg so you can figure it out with the 56.08 kg) has it set up using fractions. The idea is that you are multiplying by one each time, just in a different way.

anonymous · Answer

we do it like |dw:1383531999954:dw|

anonymous · Answer

Okay good. that's the way I do it.

anonymous · Answer

awesome! i get super tripped up on where to put what so the right units cancel if that makes any sense

anonymous · Answer

They have to be on opposite sides. Like if kg is on top on the first fraction, it has to be on the bottom for the next.

anonymous · Answer

Would you like me to show you using just 50 kg or go ahead and solve for the 56.08?

anonymous · Answer

if you could just give me an example with 50 grams so i could figure it out myself using an example would be great!

anonymous · Answer

|dw:1383532236767:dw|