2,4-dimethylhexan-3-one can someone tell me the structural formula​

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

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

Compare and contrast solutions and suspensions