What units do chemists normally use for density of liquids, solids and gas? Explain the differences.

After cloud droplets form, what must happen to them for precipitation to occur?

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

Consider this initial-rate data at a certain temperature for the reaction described by