Predict which one of the following compounds would be insoluble in water.

a. ch₄
b. na₂so₄
c. hcl
d. nacl

What are transitions between a liquid and a solid called? identify which way they are transitioning

Can someone me with 3 and 4 plz. this is for masteries test.

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.