1. a basic solution with an initial base concentration of 0.021 mol/l and an equilibrium concentration for bh+ of 1.38×10−2 has a ph of blank.
2. a basic solution with an initial base concentration of \rm 0.021 \ mol/l and an equilibrium concentration for \rm bh^+ of \rm 1.38 \times 10^{-2} has a ph of blank.
3. the \arm pkb of the base is blank..
4. the pkb of the base is a basic solution with an initial base concentration of \rm 0.021 \ mol/l and an equilibrium concentration for \rm bh^+ of \rm 1.38 \times 10^{-2} has a ph of blank.
5. the \arm pkb of the base is blank..

yes they ca   is ur ansswerrr

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

they are all solids.