The best reason for why a covalent bond forms is... Group of answer choices

a two atoms exist as ions and the ions are attracted to each other.

b the atoms that form cations have low ionization energy and anions have high electron affinity, so the two atoms exchange electrons.

c nonmetal atoms cannot react with each other unless they share electrons.

d atoms with high electronegativities will not lose electrons, so instead they share electrons to reach a stable number of valence electrons.

Can someone me with questions 12 and 13 plz.

You mix the pks of succinic acid are 4.21 and 5.64. how many gramsa graduate student at sdsu wants to measure the activity of a particular enzyme at ph 4.0. to buffer her reaction, she will use a buffer system based on one of the acids listed below, which acid is most appropriate for the experiment? of monosodium succinate (fw = 140 g/mol) and disodium succinate (fw = 162 g/mol) must be added to 1 l of water to produce a solution with a ph 5.28 and a total solute concentration of 100 mm? (assume the total volume remains 1 liter, answer in grams monosodium succinate, grams disodium succinate, respectively.) volumes of 0.05 m nah2po4 and 0.05 m na2hpo4 (pk's for phosphoric acid are 2.15, 6.82 and 12.38). which of the following best describes the resulting solution?

Ineed ! i have no clue how to do this problem.