What is the temperature range for ammonium nitrate crystals and a pouch of water?

What are the spectator ions in 2h+ + so42- + ca2+ + 2r → caso4 + 2h+ + 21?

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.

We are hoping to create 5.72 grams of glucose. the plant was given 4.75 liters of co2 and 2.81 g of h20. which reactant was the limiting reagent? how much excess mass did we have of the other reactant?