What did early scientists assume that the polar caps had in common?

They assumed they both had water.

Explanation:

Because they only could look at it through telescopes that were not advanced

explanation:

0.07 g/cm³

1.37 g/cm³

a). in this case, dh> 0 and sd> 0. if t becomes larger, the term "-tds" will become more negative. at some point, it is possible that -dts will be more negative than the dh is positive, and the reaction will become spontaneous. this is probably the correct answer, but you should look at all of the other possibilities and make sure of that.