How many calories are needed in total to melt 2.00 g of ice at 0.0˚C, raise the temperature of the water to 100. ˚C, and change all the water to steam at 100. ˚C?

Calculate the number of molecules present in 0.750 mol of mgo.

Insoluble sulfide compounds are generally black in color. which of the following combinations could yield a black precipitate? check all that apply. na2s(aq)+kcl(aq) li2s(aq)+pb(no3)2(aq) pb(clo3)2(aq)+nano3(aq) agno3(aq)+kcl(aq) k2s(aq)+sn(no3)4(aq)

In in , is to a 28.4-g (1-oz)−23.0 °c to −1.0 °c?