The reaction for the combustion of acetylene is
shown. Explain why this reaction is a redox
reaction by identifying the oxidation numbers that
change, what is oxidized, what is reduced, and
what happens to the electrons during the reaction.
2C2H2 + 502 — 4002 + 2H2O

Which is true of chemicals? a. things containing chemicals always cost a lot of money. b. chemicals are never dangerous. c. chemicals are in many substances in a home. d. chemicals are rarely found on earth.

In which layer of earth do most earthauakes occur a_ inner core b_outer core c_mantle d_crust

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