Consider the balanced equation below. 3fe+> fe3o4+4h2 what is the mole ratio of fe3o4 to fe? a. 1: 3 b. 1: 4 c. 3: 1 d. 4: 3

In all living cells dna controls cellular activities by

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

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?