Which buffer system will have the highest buffering capacity, at the pH=7.2? Select one
O a The buffer whose pka=8.5
O b. The buffer whose pka-6
O c. It does not depend on ka
O d. The buffer whose pka=78​

Si una estrella no tiene paralaje medible, ¿qué puedes inferir?

1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false

One does not belong why? ice, gold ,wood ,diamond and table salt