How many grams of aluminum reacted if 2.5 moles of Al2O3were produced? 2 Al + Fe2O3 2 Fe + Al2O3

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

Which electron configuration represents the electrons in an atom of sodium in the ground state at stp

Hno2 + caco3 = h2co3 + ca(no2) can someone balance this