To an insulated container with 100.0 g H20 (l) at 20.0 C, 175 g steam at 100 C and 1650 g of ice at 0.0 C are added. A) What mass of ice remains unmelted after equilibrium is established? B) What additional mass of steam should be introduced to just melt all the ice? I feel like for A) I should try and find how much was used (melted) and subtract is from the total (1650 g), however I don't know how to find how much was used.