Final answer:
A client with a phosphorus level of 2.4 mg/dL may experience weakness and fatigue.
Step-by-step explanation:
The nurse should expect weakness and fatigue in a client with a phosphorus level of 2.4 mg/dL. Hypophosphatemia, or abnormally low phosphate blood levels, can cause muscle weakness and fatigue. In this case, the low phosphorus level indicates a deficiency in phosphorus, which is necessary for proper muscle function and energy production. This deficiency can result in weakness and fatigue.