'A patient receives 2900mL of an IV solution containing 3g of glucose per 100 mL. How much energy, in kilocalories, does the patient obtain from glucose?

Answer 1

I have always used 4kcal/g carbohydrate. Probably that's an average and glucose may not be "average" but based on that the answer is
3 g x (2900/100) = g glucose infused = about 87g.

Then 4 kcal/g glucose x 87g glucose = ? kcal

I found on the web numbers from 3.3 to 3.8 kcal/grams glucose