How did the experiment with the iron filings and sulfur compare with the experiment in which copper sulfate pentahydrate was heated?

Which best describes why nh4+ can form an ionic bond with cl-?

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

Select all of the methods through which a drug can enter your body. injection swallowing inhalation absorption