Calcium carbonate decomposes to solid calcium oxide and carbon dioxide gas when heated. If a 5.00 gram sample of calcium carbonate is heated, liberating 2.20 grams of carbon dioxide gas and leaving behind 2.80 grams of solid calcium oxide, the Law of Conservation of Mass has been violated. a. True
b. False

Which substance absorbs 58.16 kj of energy when 3.11 mol vaporizes? a)ch4 b)h2s c)co2 d)nacl

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

What is the main reason why some developing countries fear the increase the free trade policies around the world?