The nurse made the right choice in removing the diaper from the baby because the cause of the excoriated skin is the baby's feces. The baby's diarrhea is causing a rash in the skin due to its acidity. By removing the diaper, it's allowing the skin to not be in contact with the acid.
Do you have a conversion sheet? If not, go ahead an google one and reply to this comment so I can teach you how to convert quarts into liters step by step.