Water molecules hydrate ions in solution by electrostatic interactions such that the waters are oriented with the toward the cations. And are oriented toward the anions.

a) mixture of orientations. the same mixtures of orientations

b) electronegative oxygen. electropositive hydrogens

c) other cations. other anions

d) hydrogen bonding. oxygens

Fission of uranium-235 products energy and a. isotopes of smaller elements b. isotopes of larger elements c. lighter isotopes of uranium d. heavier isotopes of uranium

Which of the following is a physical property flammability heat of combustion solubility and toxicity

Suppose a pair of chemical compounds a and b can react in two different ways: a + b -> c reaction 1 gives product c. a + b -> d reaction 2 gives product d. the following facts are known about the two reactions: . reaction 1 is endothermic and reaction 2 is exothermic. if a reaction vessel is charged (filled) with a and b , then at first d is produced faster than c. use these facts to sketch a qualitative reaction energy diagram for both reactions. note: because these sketches are only qualitative, the energies don? t have to be exact. they only have to have the right relationship to each other. for example, if one energy is less than another, that fact should be clear in your sketch.