Calculate the pH of a 0.500 M aqueous solution of NH3 . The Kb of NH3 is 1.77x10-5

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial

Based on its chemical properties, identify the position of each chemical family on the periodic table.

Adilute aqueous potassium nitrate solution is