The magnitude of these forces is directly proportional to boiling and melting points. In addition, molecular polarity<span> affects </span>solubility<span> in that polar molecules are best solvated by polar solvent molecules and nonpolar molecules are best solvated by nonpolar solvent molecules; i.e., "like dissolves like".</span>
Answer: I Think It's D) The change of solubility with temperature is the same for all substances.
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No, the two isotopes of lithium-6 and lithium-7 are not equally common.
The more plentiful isotope would be lithium-7.
This can be easily demonstrated by assuming that both isotopes were equally common. If that were the case, the average atomic mass would be (6 + 7)/2 = 6.5 amu. Now compare that value if they were both equal to the actual value found in nature. The value found in nature is 6.941 amu which is heavier than the 6.5 amu that would happen if they were equally common. Since the natural value is heavier, that means that there has to be more of the heavier isotope than there is of the lighter one. Therefore lithium-7 is more common than lithium-6.