wants to make a 1 liter solution of 0.5 M alanine at pH 2.6. The pKa of carboxylic acid is 2.34 and the pKa of α-amino group is 9.60. Use this information to answer questions 1-4. Which groups would be fully protonated or fully deprotonated at this pH?

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of tthe table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?