In an air-carbon dioxide mixture in a tube of diameter 10 cm at 298 K and 202.6 kPa, the partial pressure of CO2 at two planes 3 mm apart are 30.4 and 50.6 KPa respectively. The diffusivity of CO2 in air at 298 K and 202.6 kPa is 8.2*10 m 2 /s Calculate the rate of transfer of CO2 across the two planes, assuming: a. Equimolecular counter diffusion. b. Diffusion of CO2 through a stagnant air layer. c. In case 4a) what is the diffusion of coin moles per minute. 4+4+21

b.false that your answer

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.

the objects have the same charge.