Water and oil are "immiscible", meaning they do not mix but stay separated when combined in a glass. What is the best explanation for this?

1.both are polar molecules

2.both are nonpolar molecules

3.water is a polar molecule and oil is a nonpolar molecule

4.water and oil are both compounds

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.