A 100 mmol/L solution of MgCl2 would be expected to have an osmolality of which of the following?

A) 50 mOsm/kg H2O B) 100 mOsm/kg H2O C) 200 mOsm/kg H2O D) 300 mOsm/kg H2O E) 350 mOsm/kg H2O A) 50 mOsm/kg H2O B) 100 mOsm/kg H2O C) 200 mOsm/kg H2O D) 300 mOsm/kg H2O E) 350 mOsm/kg H2O D

Three individuals,each weighing 55 kg and each having a plasma [Na+] of 145 mEq/L,receive infusions of different solutions.Individual A receives 1 L of isotonic NaCl (290 mOsm/kg H2O); individual B receives 1 L of a mannitol solution (290 mOsm/kg H2O); and individual C receives 1 L of a 5% dextrose in water (D5W)solution (290 mOsm/kg H2O).Assuming that there is no urine output,and after complete equilibration of the extracellular and intracellular fluid,which of these individuals will have a lower plasma [Na+]?

A) Individual A (NaCl infusion). B) Individual B (mannitol infusion). C) Individual C (D5W infusion). D) Individuals A,B,and C will have the same plasma [Na+]. A) Individual A (NaCl infusion). B) Individual B (mannitol infusion). C) Individual C (D5W infusion). D) Individuals A,B,and C will have the same plasma [Na+].