Final answer:
The rate of oxygen for a nasal cannula (NC) for COPD patients can vary between 1 to 6 L/min depending on the patient's needs.
Step-by-step explanation:
The rate of oxygen for a nasal cannula (NC) for COPD patients can vary depending on the patient's needs. Typically, the flow rate of oxygen for NC ranges from 1 to 6 liters per minute (L/min). The healthcare provider will determine the appropriate flow rate based on the patient's oxygen saturation levels and respiratory needs.