Which answer best describes what is happening in the following reaction? 2c8h18 + 25o2 mc022-1.jpg 16co2 + 18h2o this is not a redox reaction. it is an example of combustion. this is a redox reaction in which octane (c8h18) is oxidized. this is a redox reaction in which carbon dioxide (co2) burns due to ignition. this is not a redox reaction, because a solution of carbon dioxide and water results.

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 terms are used to identify pure substances

Consider the reaction: 2al(s) + fe2o3(s) → al2o3(s) + 2fe(s) the δhf for fe2o3(s) = -824.3 kj/mole. the δhf for al2o3(s) = -1675.7 kj/mole. finish the equation. δhrxn = [(1)( kj/mole) + (2)( kj/mole)] - [(1)( kj/mole) + (2) ( kj/mole)]