Final answer:
Three liters of a 5% dextrose solution provide approximately 600 kilocalories per day, by multiplying the amount of glucose in grams (150) by the energy content of carbohydrates (4 kcal/g). Therefore, the correct option is b.
Step-by-step explanation:
The student has asked how many kilocalories are supplied by 3 liters of a 5% dextrose solution per day. One liter of a 5% dextrose solution contains 50 grams of sugar. Knowing that carbohydrates provide approximately 4 kilocalories per gram, we can calculate the total kilocalories supplied by 3 liters of solution.
To calculate the total, multiply 50 grams (the amount of glucose per litre) by 3 (litres per day), yielding 150 grams of glucose per day. Then, by multiplying 150 grams by 4 kilocalories per gram, we find that 3 liters of a 5% dextrose solution provide 600 kilocalories per day.