Offering 100 points me! you : )

4. the steam in question 3 is used to melt ice. how much ice will be
melted by the energy released by the condensation of the steam at
100.0°c?

question 3 is here:

3. how much energy is absorbed when the water at 100.0°c in question 2
vaporizes to 100.0°c? the heat of vaporization of water is 540 cal/g.

Two models of the same compound are shown. in what way is model b better than model a? model b shows the types of elements in the compound, but model a does not. model b shows the three-dimensional shape of the molecule, but model a does not. model b shows how the atoms in the molecule are connected, but model a does not. model b shows the number of atoms of each element in the molecule, but model a does not