Cho phản ứng: C6H6+15/2O2-> 6O2+3H2O ở 300K có QP – QV =1245J. Hỏi C6H6 và H2O trong phản ứng ở trạng thái lỏng hay hơi?

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?