Which statement best describes how scientists and engineers work together in the research and development cycle?
A. Engineers develop a new technology, and then scientists use it to
make a new discovery.
B. Engineers do experiments to answer questions about nature, and
then scientists use the results to create a new technology.
C. Scientists develop a theory, and then engineers perform
experiments to verify its accuracy.
D. Scientists make designs based on engineering knowledge and
then make it available for public use.

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.

Which of these is an intensive property of a substance

The solid xy decomposes into gaseous x and y: xy(s) m x(g) + y(g) kp = 4.1 (at 0 °c) if the reaction is carried out in a 22.4 l container, which initial amounts of x and y will result in the formation of solid xy?