Question: how many moles of water are produced from 19.2 of b2h6?
Answer: Note: 27.66 g B₂H₆ is from the molar mass of diborane; it is necessary for us to use this to cancel the units. I provided an image for the cancellation of the necessary units. Hence, there will be 1.39 moles of water produced from 19.2 grams of B₂H₆.