[Krysiak]

 Hello,
      I am having trouble understanding this conversion problem.This is the right way 1,500mL/1 . 0.000L/1mL . 1KL/1,000L the way I did it which is wrong is this 1,500mL/1 . 0.000L/1mL . 1,000kL/1L
 What I don't understand is why do I have to write 1,000kL/1L opposed to 1kL/1,000L if they are both equal and liters is able to cancel.Any help would be great ,Thanks!
 

[Yggdrasil]

With conversions all your conversion factors must be equal to 1.

For example, we know that 1000g = 1 kg.  Therefore, if we divide both sides by 1kg, we get 1000g/1kg = 1.  Alternatively, if we divide both sides by 1000g, we get 1kg/1000g =1.  So both of those ratios are valid conversion factors.

So, now can you see why 1000L/1kL is a valid conversion factor and why 1000kL/1L is not a valid conversion factor?