Why does a microscope stage have a small hole in it? A: To prevent slides from sticking to the stage
B: To allow light to pass through
C: To secure slides to the stage
D: To hold the specimen in place

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.