The change in entropy, δ s ∘ rxn , is related to the the change in the number of moles of gas molecules, δ n gas . determine the change in the moles of gas for each of the reactions and decide if the entropy increases, decreases, or has little or no change. a. 2 h 2 ( g ) + o 2 ( g ) ⟶ 2 h 2 o ( l )

Magnesium is the limiting reactant in this experiment. calculate the theoretical yield of mgo for each trial. trial 1: trial 2: data mass of empty crucible with lid trial 1: 26.688 trial 2: 26.681 mass of mg metal, crucible, and lid trial 1: 26.994 trial: 2 26.985 mass of mgo, crucible, and lid trial 1: 27.188 trial 2: 27.180